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1. unclesp1d3r

   added a parent issue on Nov 10, 2025

   • Epic: v0.4 - Advanced Binary Analysis Features (DWARF, Mach-O Load Commands, Go Build Info) #42
2. unclesp1d3r

   added the

   Bug

   issue type on Nov 10, 2025
3. unclesp1d3r

   changed the issue type from

   Bug

   to

   Feature

   on Nov 10, 2025
4. traycerai commented on Nov 10, 2025

   

   trayceraiBot

   on Nov 10, 2025 – with traycerai

   Last edited by traycerai

   More actions

   Plan

   Observations

   The codebase provides a solid foundation with goblin-based container parsing for ELF, PE, and Mach-O formats, including section classification and import/export extraction. The extraction module is currently empty, ready for new extractors. types.rs defines FoundString, StringSource, and Tag enums that need extension for Go-specific metadata. No existing Go buildinfo parsing; a custom implementation is required following Go's debug/buildinfo format specification. Test fixtures and integration tests exist for other formats, providing patterns to follow.

   Approach

   Implement a custom Go buildinfo parser in a new extraction/go_buildinfo.rs module. Locate the buildinfo section by name (.go.buildinfo for ELF/Mach-O, scan writable sections for PE) or fallback to magic byte scanning (\xff Go buildinf:). Parse the 16-byte header for pointer size, endianness, and string format (pointer vs. inline). Extract Go version and module info strings, then parse module info into structured fields (version, path, settings, VCS). Emit each as high-score FoundString with StringSource::GoBuildInfo and appropriate tags. Integrate into CLI with --go-buildinfo filter and update docs/tests.

   Reasoning

   I examined the repository structure to understand the project layout. I reviewed the core type definitions to identify necessary extensions for new sources and tags. I analyzed the container parsing modules to see how sections are accessed and classified. I inspected the empty extraction module to plan its expansion. I researched Go buildinfo format details and confirmed no suitable existing Rust crate exists, necessitating a custom parser. I studied existing test patterns for integration testing guidance.

   Proposed File Changes

   📄 src/types.rs ^(MODIFY) 🔗

   Extend the StringSource enum (lines 62-75) by adding a new variant GoBuildInfo to represent strings extracted from Go build information sections.

   Extend the Tag enum (lines 14-39) with new variants for Go-specific classification:

   • Module for Go module paths
   • BuildSetting for build flags and environment variables
   • VcsInfo for version control metadata (revision, timestamp)
   • GoBuildInfo as a general tag for all buildinfo strings

   The existing Version tag will be reused for Go compiler versions. Ensure all new variants implement Serialize and Deserialize with appropriate serde attributes if needed for JSON output.

   📄 src/extraction/mod.rs ^(MODIFY) 🔗

   
   

   References

   • 📄 src/extraction/go_buildinfo.rs ^(NEW)
   • 📄 src/types.rs ^(MODIFY)

   Replace the placeholder comment with a proper module declaration including pub mod go_buildinfo;. Add a public function pub fn extract_all(container_info: &ContainerInfo, data: &[u8]) -> Vec<FoundString> that dispatches to format-specific extractors, starting with Go buildinfo. For now, it can call go_buildinfo::extract_go_buildinfo(container_info, data) and return the results. This sets up the framework for future extractors like symbols or resources.

   📄 src/extraction/go_buildinfo.rs ^(NEW) 🔗

   
   

   References

   • 📄 src/types.rs ^(MODIFY)
   • 📄 src/container/mod.rs

   Implement a complete Go buildinfo extraction module.

   Define constants: magic bytes [0xff, b'G', b'o', b' ', b'b', b'u', b'i', b'l', b'd', b'i', b'n', b'f', b':'], header size 16 bytes, section names .go.buildinfo (ELF), __go_buildinfo,__data (Mach-O).

   Create structs: BuildInfoHeader (magic validation, ptr_size: u8, flags: u8), BuildInfo (goversion: String, path: String, main_version: Option, deps: Vec, settings: Vec<(String, String)>, vcs: Option).

   Implement locate_buildinfo_section(container_info: &ContainerInfo) -> Option<(u64, u64)> to find section by name or scan for magic in writable sections.

   Implement parse_header(data: &[u8]) -> Result<BuildInfoHeader> to read and validate header.

   Implement extract_strings(header: &BuildInfoHeader, section_data: &[u8], base_offset: u64) -> Vec<FoundString> handling pointer-based (follow ptr+len) or inline varint strings, parsing module info format (path@version; deps; settings; vcs).

   Main function pub fn extract_go_buildinfo(container_info: &ContainerInfo, data: &[u8]) -> Vec<FoundString>: locate section, read data slice, parse header, extract/parse fields, create FoundString for each (text=field value, source=GoBuildInfo, score=95, tags=[GoBuildInfo, relevant tag like Version/Module], offset=calculated, section=section.name).

   Handle errors gracefully, returning empty vec if not found. Use little-endian by default, adjust for flags.

   📄 src/lib.rs ^(MODIFY) 🔗

   
   

   References

   • 📄 src/extraction/go_buildinfo.rs ^(NEW)
   • 📄 src/extraction/mod.rs ^(MODIFY)

   Update module documentation (lines 34-42) to note that Go buildinfo extraction is now implemented in the extraction module.

   Add re-export pub use extraction::go_buildinfo; to make the extractor publicly available.

   Update the basic usage example (lines 19-32) to demonstrate calling extraction::extract_all(&container_info, &data) after parsing the container.

   📄 src/main.rs ^(MODIFY) 🔗

   
   

   References

   • 📄 src/extraction/mod.rs ^(MODIFY)
   • 📄 src/types.rs ^(MODIFY)
   • 📄 src/lib.rs ^(MODIFY)

   Enhance the CLI to support Go buildinfo extraction.

   Add clap derives or matches for flags: --go (enable Go features), --only go-buildinfo (filter to only Go strings).

   In main, after parsing container: call extraction::extract_all(&container_info, &data) to get Vec<FoundString>, then filter based on flags (e.g., if --only go-buildinfo, keep only those with source GoBuildInfo).

   Implement simple output: for each string, print offset, score, tags, source, text (formatted by length).

   Add error handling for unsupported formats.

   📄 Cargo.toml ^(MODIFY) 🔗

   No new dependencies required; goblin already handles binary parsing. Ensure goblin = "0.6" or latest compatible version supports all needed ELF/PE/Mach-O features. Add dev-dependency insta if not present for snapshot testing.

   📄 tests/fixtures/test_go_buildinfo_elf ^(NEW) 🔗

   Add a test fixture: compile a simple Go program (e.g., package main; import "fmt"; func main() { fmt.Println("Hello Go!") }) with go build -o test_go_buildinfo_elf -ldflags='-buildvcs=false' to include buildinfo section without VCS. Ensure it's ELF amd64 Linux.

   📄 tests/fixtures/README.md ^(MODIFY) 🔗

   
   

   References

   • 📄 tests/fixtures/test_go_buildinfo_elf ^(NEW)

   Update the fixtures list to include the new Go binary fixture and build instructions: go mod init test; go build -o test_go_buildinfo_elf main.go. Note platforms and Go version requirements (1.18+).

   📄 tests/integration_go_buildinfo.rs ^(NEW) 🔗

   
   

   References

   • 📄 tests/integration_elf.rs
   • 📄 src/extraction/go_buildinfo.rs ^(NEW)
   • 📄 tests/fixtures/test_go_buildinfo_elf ^(NEW)

   Create integration tests mirroring integration_elf.rs.

   Test detection: load fixture, extract, assert non-empty with source == GoBuildInfo.

   Test fields: assert presence of Go version (matches "go1.*"), module path, settings like GOOS/GOARCH.

   Test scoring: all Go strings have score >=95.

   Test fallback: on non-Go binary, returns empty.

   Test malformed: modify fixture header, ensure graceful empty return.

   Snapshot test: capture formatted output of extracted strings.

   📄 docs/src/string-extraction.md ^(MODIFY) 🔗

   
   

   References

   • 📄 src/extraction/go_buildinfo.rs ^(NEW)

   Add a new section 'Go Buildinfo Extraction' after 'Import/Export Names'.

   Describe the format: magic bytes, header, string extraction (pointer/inline), module info parsing.

   List extracted fields: GoVersion (tag: Version), Path (Module), Settings (BuildSetting), VCS (VcsInfo).

   Explain location strategy: section name search + magic scan fallback.

   Provide usage example: stringy --only go-buildinfo binary.

   Note high confidence (95+) due to structured nature.

   📄 docs/src/cli.md ^(MODIFY) 🔗

   
   

   References

   • 📄 src/main.rs ^(MODIFY)

   In 'Usage' section, add examples for Go extraction: stringy go_binary --go and stringy go_binary --only go-buildinfo.

   In 'Options' table, add --go (enable Go extractors) and extend --only to support go-buildinfo.

   In 'Tags' section, document new tags: module, build-setting, vcs-info, go-buildinfo.

   Import In IDE

   🤖 Prompt for AI Agents

   I have created the following plan after thorough exploration and analysis of the codebase. Follow the below plan verbatim. Trust the files and references. Do not re-verify what's written in the plan. Explore only when absolutely necessary. First implement all the proposed file changes and then I'll review all the changes together at the end.
   
   ### Observations
   
   The codebase provides a solid foundation with goblin-based container parsing for ELF, PE, and Mach-O formats, including section classification and import/export extraction. The `extraction` module is currently empty, ready for new extractors. `types.rs` defines `FoundString`, `StringSource`, and `Tag` enums that need extension for Go-specific metadata. No existing Go buildinfo parsing; a custom implementation is required following Go's debug/buildinfo format specification. Test fixtures and integration tests exist for other formats, providing patterns to follow.
   
   ### Approach
   
   Implement a custom Go buildinfo parser in a new `extraction/go_buildinfo.rs` module. Locate the buildinfo section by name (`.go.buildinfo` for ELF/Mach-O, scan writable sections for PE) or fallback to magic byte scanning (`\xff Go buildinf:`). Parse the 16-byte header for pointer size, endianness, and string format (pointer vs. inline). Extract Go version and module info strings, then parse module info into structured fields (version, path, settings, VCS). Emit each as high-score `FoundString` with `StringSource::GoBuildInfo` and appropriate tags. Integrate into CLI with `--go-buildinfo` filter and update docs/tests.
   
   ### Reasoning
   
   I examined the repository structure to understand the project layout. I reviewed the core type definitions to identify necessary extensions for new sources and tags. I analyzed the container parsing modules to see how sections are accessed and classified. I inspected the empty extraction module to plan its expansion. I researched Go buildinfo format details and confirmed no suitable existing Rust crate exists, necessitating a custom parser. I studied existing test patterns for integration testing guidance.
   
   ## Proposed File Changes
   
   ### src/types.rs(MODIFY)
   
   Extend the `StringSource` enum (lines 62-75) by adding a new variant `GoBuildInfo` to represent strings extracted from Go build information sections.
   
   Extend the `Tag` enum (lines 14-39) with new variants for Go-specific classification:
   - `Module` for Go module paths
   - `BuildSetting` for build flags and environment variables
   - `VcsInfo` for version control metadata (revision, timestamp)
   - `GoBuildInfo` as a general tag for all buildinfo strings
   
   The existing `Version` tag will be reused for Go compiler versions. Ensure all new variants implement `Serialize` and `Deserialize` with appropriate `serde` attributes if needed for JSON output.
   
   ### src/extraction/mod.rs(MODIFY)
   
   References: 
   
   - src/extraction/go_buildinfo.rs(NEW)
   - src/types.rs(MODIFY)
   
   Replace the placeholder comment with a proper module declaration including `pub mod go_buildinfo;`. Add a public function `pub fn extract_all(container_info: &ContainerInfo, data: &[u8]) -> Vec<FoundString>` that dispatches to format-specific extractors, starting with Go buildinfo. For now, it can call `go_buildinfo::extract_go_buildinfo(container_info, data)` and return the results. This sets up the framework for future extractors like symbols or resources.
   
   ### src/extraction/go_buildinfo.rs(NEW)
   
   References: 
   
   - src/types.rs(MODIFY)
   - src/container/mod.rs
   
   Implement a complete Go buildinfo extraction module.
   
   Define constants: magic bytes `[0xff, b'G', b'o', b' ', b'b', b'u', b'i', b'l', b'd', b'i', b'n', b'f', b':']`, header size 16 bytes, section names `.go.buildinfo` (ELF), `__go_buildinfo,__data` (Mach-O).
   
   Create structs: `BuildInfoHeader` (magic validation, ptr_size: u8, flags: u8), `BuildInfo` (goversion: String, path: String, main_version: Option<String>, deps: Vec<String>, settings: Vec<(String, String)>, vcs: Option<VcsInfo>).
   
   Implement `locate_buildinfo_section(container_info: &ContainerInfo) -> Option<(u64, u64)>` to find section by name or scan for magic in writable sections.
   
   Implement `parse_header(data: &[u8]) -> Result<BuildInfoHeader>` to read and validate header.
   
   Implement `extract_strings(header: &BuildInfoHeader, section_data: &[u8], base_offset: u64) -> Vec<FoundString>` handling pointer-based (follow ptr+len) or inline varint strings, parsing module info format (path@version; deps; settings; vcs).
   
   Main function `pub fn extract_go_buildinfo(container_info: &ContainerInfo, data: &[u8]) -> Vec<FoundString>`: locate section, read data slice, parse header, extract/parse fields, create `FoundString` for each (text=field value, source=GoBuildInfo, score=95, tags=[GoBuildInfo, relevant tag like Version/Module], offset=calculated, section=section.name).
   
   Handle errors gracefully, returning empty vec if not found. Use little-endian by default, adjust for flags.
   
   ### src/lib.rs(MODIFY)
   
   References: 
   
   - src/extraction/go_buildinfo.rs(NEW)
   - src/extraction/mod.rs(MODIFY)
   
   Update module documentation (lines 34-42) to note that Go buildinfo extraction is now implemented in the extraction module.
   
   Add re-export `pub use extraction::go_buildinfo;` to make the extractor publicly available.
   
   Update the basic usage example (lines 19-32) to demonstrate calling `extraction::extract_all(&container_info, &data)` after parsing the container.
   
   ### src/main.rs(MODIFY)
   
   References: 
   
   - src/extraction/mod.rs(MODIFY)
   - src/types.rs(MODIFY)
   - src/lib.rs(MODIFY)
   
   Enhance the CLI to support Go buildinfo extraction.
   
   Add clap derives or matches for flags: `--go` (enable Go features), `--only go-buildinfo` (filter to only Go strings).
   
   In main, after parsing container: call `extraction::extract_all(&container_info, &data)` to get `Vec<FoundString>`, then filter based on flags (e.g., if `--only go-buildinfo`, keep only those with source GoBuildInfo).
   
   Implement simple output: for each string, print offset, score, tags, source, text (formatted by length).
   
   Add error handling for unsupported formats.
   
   ### Cargo.toml(MODIFY)
   
   No new dependencies required; goblin already handles binary parsing. Ensure `goblin = "0.6"` or latest compatible version supports all needed ELF/PE/Mach-O features. Add dev-dependency `insta` if not present for snapshot testing.
   
   ### tests/fixtures/test_go_buildinfo_elf(NEW)
   
   Add a test fixture: compile a simple Go program (e.g., package main; import "fmt"; func main() { fmt.Println("Hello Go!") }) with `go build -o test_go_buildinfo_elf -ldflags='-buildvcs=false'` to include buildinfo section without VCS. Ensure it's ELF amd64 Linux.
   
   ### tests/fixtures/README.md(MODIFY)
   
   References: 
   
   - tests/fixtures/test_go_buildinfo_elf(NEW)
   
   Update the fixtures list to include the new Go binary fixture and build instructions: `go mod init test; go build -o test_go_buildinfo_elf main.go`. Note platforms and Go version requirements (1.18+).
   
   ### tests/integration_go_buildinfo.rs(NEW)
   
   References: 
   
   - tests/integration_elf.rs
   - src/extraction/go_buildinfo.rs(NEW)
   - tests/fixtures/test_go_buildinfo_elf(NEW)
   
   Create integration tests mirroring `integration_elf.rs`.
   
   Test detection: load fixture, extract, assert non-empty with `source == GoBuildInfo`.
   
   Test fields: assert presence of Go version (matches "go1.*"), module path, settings like GOOS/GOARCH.
   
   Test scoring: all Go strings have score >=95.
   
   Test fallback: on non-Go binary, returns empty.
   
   Test malformed: modify fixture header, ensure graceful empty return.
   
   Snapshot test: capture formatted output of extracted strings.
   
   ### docs/src/string-extraction.md(MODIFY)
   
   References: 
   
   - src/extraction/go_buildinfo.rs(NEW)
   
   Add a new section 'Go Buildinfo Extraction' after 'Import/Export Names'.
   
   Describe the format: magic bytes, header, string extraction (pointer/inline), module info parsing.
   
   List extracted fields: GoVersion (tag: Version), Path (Module), Settings (BuildSetting), VCS (VcsInfo).
   
   Explain location strategy: section name search + magic scan fallback.
   
   Provide usage example: `stringy --only go-buildinfo binary`.
   
   Note high confidence (95+) due to structured nature.
   
   ### docs/src/cli.md(MODIFY)
   
   References: 
   
   - src/main.rs(MODIFY)
   
   In 'Usage' section, add examples for Go extraction: `stringy go_binary --go` and `stringy go_binary --only go-buildinfo`.
   
   In 'Options' table, add `--go` (enable Go extractors) and extend `--only` to support `go-buildinfo`.
   
   In 'Tags' section, document new tags: `module`, `build-setting`, `vcs-info`, `go-buildinfo`.

   ---

   Developer Humor

   In the world of binaries, where strings hide deep,\n> Go buildinfo whispers secrets we need to keep.\n> With magic bytes and headers so fine,\n> We extract the truth, line by line!\n> Score it high at ninety-five,\n> Go binaries now come alive! 🐹🔍

   ---

   Execution Information

   Branch: main
   Commit: 37cfc7c

   ---

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5. dosubot

   added

   enhancementNew feature or requestNew feature or request

   on Nov 10, 2025
6. unclesp1d3r commented on Nov 10, 2025

   

   unclesp1d3r

   on Nov 10, 2025

   MemberAuthor

   More actions

   @coderabbitai Enhance this issue body with additional context and a proposed solution. Improve the issue title and assign the proper labels and other metadata.

   👀React with 👀1Reacted by coderabbitai
7. coderabbitai

   changed the title [-]Go Build Info Detection[/-] [+]Implement Go Build Info Extraction for Binary Analysis[/+] on Nov 10, 2025
8. coderabbitai

   added

   area:analyzerBinary analyzer functionalityBinary analyzer functionality

   lang:rustRust implementationRust implementation

   needs:testsNeeds test coverageNeeds test coverage

   priority:mediumMedium priority taskMedium priority task

   MVPMinimum viable product featuresMinimum viable product features

   on Nov 10, 2025
9. coderabbitai

   assigned

   unclesp1d3r

   on Nov 10, 2025
10. coderabbitai commented on Nov 10, 2025

    

    coderabbitaiBot

    on Nov 10, 2025 – with coderabbitai

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    🏁 Script executed:

    #!/bin/bash
    # Fetch the current issue details
    gh issue view 64 --json title,body,labels,assignees,milestone,state --repo EvilBit-Labs/StringyMcStringFace
    

    Length of output: 1821

    ---

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    #!/bin/bash
    # List available labels in the repository to choose appropriate ones
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    ---

    GoVersion: go1.21.5
    Path: github.com/user/project
    Main.Version: v1.2.3
    Build.Settings:

    • CGO_ENABLED=1
    • GOARCH=amd64
    • GOOS=linux
    • vcs=git
    • vcs.revision=a1b2c3d4
    • vcs.time=2024-01-15T10:30:00Z
    • vcs.modified=false

    
    ## Proposed Implementation
    
    ### Phase 1: Parser Implementation
    
    1. **Dependency**: Use the `gobuild` crate or implement custom parser
       - `gobuild` crate provides ready-made buildinfo parsing
       - Alternative: Implement parser following Go's debug/buildinfo format
    
    2. **Section Location**:
       - ELF: Look for `.go.buildinfo` section
       - PE: Check for `.go.buildinfo` or `.gopclntab` section
       - Mach-O: Search in `__DATA` segment
       - Fallback: Scan for `\xff Go build` magic bytes in binary
    
    3. **Data Extraction**:
       - Parse buildinfo structure using format specification
       - Extract fields: `GoVersion`, `Path`, `Main.Version`, `Settings[]`
       - Handle VCS metadata: revision, timestamp, modified flag
    
    ### Phase 2: Integration
    
    4. **Create `ExtractionSource::GoBuildInfo`**:
       - New extraction source type for Go build metadata
       - Confidence score: 95+ (extremely high signal-to-noise ratio)
    
    5. **Emit Structured Strings**:
       - Each field as separate `ExtractedString`
       - Tags: `go-buildinfo`, `version`, `module`, `vcs`, `build-settings`
       - Include metadata: field name, value, confidence
    
    6. **CLI Support**:
       - Add `--only go-buildinfo` filter for quick Go binary identification
       - Consider `--go` flag that enables all Go-specific extractors
    
    ## Acceptance Criteria
    
    - [ ] Successfully extracts build info from Go 1.18+ binaries (ELF, PE, Mach-O)
    - [ ] Parses and emits all standard fields: version, path, main version, settings, VCS info
    - [ ] Handles binaries with missing or partial build info gracefully
    - [ ] Falls back to magic byte scanning when sections are missing
    - [ ] Achieves 95+ confidence score for extracted data
    - [ ] Supports `--only go-buildinfo` filter
    - [ ] Provides structured output with appropriate tags
    - [ ] Works with both statically and dynamically linked Go binaries
    - [ ] Handles older Go binaries (pre-1.18) with pclntab parsing
    
    ## Testing Strategy
    
    ### Test Binaries Needed
    
    1. **Modern Go binaries** (Go 1.18+):
       - Simple "Hello World" with build info
       - Binary with VCS metadata (git commit, timestamp)
       - Binary with custom build tags and settings
       - CGO-enabled binary
    
    2. **Edge cases**:
       - Stripped binary (symbol table removed)
       - Older Go binary (Go 1.16, 1.17)
       - Binary with modified/corrupted build info section
       - Binary built with `-trimpath` and `-buildvcs=false`
    
    3. **Multi-platform**:
       - Linux ELF (amd64, arm64)
       - Windows PE (amd64, 386)
       - macOS Mach-O (amd64, arm64)
    
    ### Test Cases
    
    - Verify correct extraction of all buildinfo fields
    - Validate confidence scoring
    - Test fallback mechanisms (magic byte scanning)
    - Ensure no false positives on non-Go binaries
    - Performance testing on large binaries
    
    ## Implementation Considerations
    
    - Go buildinfo format is stable across Go 1.18+
    - For older Go binaries, may need to fall back to pclntab parsing (more complex)
    - Consider memory-mapped file access for large binaries
    - Handle endianness for cross-platform support
    - Validate extracted data to prevent malformed input issues
    
    ## References
    
    - [Go Runtime Build Info](https://pkg.go.dev/runtime/debug#BuildInfo)
    - [Go Debug Buildinfo Format](https://pkg.go.dev/debug/buildinfo)
    - [`gobuild` crate](https://crates.io/crates/gobuild)
    - [Go Binary Format Specification](https://go.dev/doc/gccgo_install.html)
    
    ## Related Issues
    
    - Complements other binary analysis extractors
    - May integrate with existing section parsing logic
    - Synergizes with future dependency graph visualization features
    EOF
    
    # Update the issue
    gh issue edit 64 \
      --repo EvilBit-Labs/StringyMcStringFace \
      --title "Implement Go Build Info Extraction for Binary Analysis" \
      --body-file /tmp/enhanced_issue.md
    
    # Add labels
    gh issue edit 64 \
      --repo EvilBit-Labs/StringyMcStringFace \
      --add-label "area:analyzer,lang:rust,needs:tests,priority:medium,MVP"
    
    # Assign to unclesp1d3r
    gh issue edit 64 \
      --repo EvilBit-Labs/StringyMcStringFace \
      --add-assignee unclesp1d3r
    
    echo "Issue #64 has been enhanced with:"
    echo "- New title: 'Implement Go Build Info Extraction for Binary Analysis'"
    echo "- Comprehensive body with background, technical details, acceptance criteria, and testing strategy"
    echo "- Labels: enhancement, area:analyzer, lang:rust, needs:tests, priority:medium, MVP"
    echo "- Assigned to: unclesp1d3r"
    

    ---

    🏁 Script executed:

    #!/bin/bash
    # Update the issue with enhanced content
    
    # Create the enhanced issue body
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    ## Background
    
    Go binaries embed rich metadata about their build environment in a structured format within the `.go.buildinfo` section (or via `\xff Go build` markers). This metadata includes the Go compiler version, module path, dependencies, build settings, and VCS information. Extracting this data provides valuable insights for binary analysis, reverse engineering, and software supply chain security.
    
    ## Description
    
    Implement a Go build info extractor that parses and extracts Go build metadata from compiled binaries. This feature will analyze ELF, PE, and Mach-O binaries to locate and parse the `.go.buildinfo` section or embedded build info markers.
    
    ## Value Proposition
    
    - **Module identification**: Reveals the Go module path (e.g., `github.com/user/project`)
    - **Version tracking**: Extracts Go compiler version and module versions
    - **Build flags**: Surfaces build tags, CGO settings, and GOEXPERIMENT flags
    - **VCS metadata**: Captures git commit hash, modified status, and build timestamp
    - **Structured data**: Go embeds this in a parseable format, not arbitrary strings
    - **Supply chain visibility**: Enables dependency analysis and vulnerability tracking
    - **Reproducibility**: Helps verify build provenance and integrity
    
    ## Technical Details
    
    ### Build Info Format
    
    Go 1.18+ embeds build information in a standardized format:
    - **Section**: `.go.buildinfo` (ELF/PE/Mach-O)
    - **Magic bytes**: `\xff Go build` (fallback marker)
    - **Structure**: Protobuf-like encoding with version, path, and key-value settings
    
    ### Data Available
    
    

    Length of output: 92

    ---

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    cat > /tmp/enhanced_issue.md << 'ENDBODY'
    ## Background
    
    Go binaries embed rich metadata about their build environment in a structured format within the `.go.buildinfo` section (or via `\xff Go build` markers). This metadata includes the Go compiler version, module path, dependencies, build settings, and VCS information. Extracting this data provides valuable insights for binary analysis, reverse engineering, and software supply chain security.
    
    ## Description
    
    Implement a Go build info extractor that parses and extracts Go build metadata from compiled binaries. This feature will analyze ELF, PE, and Mach-O binaries to locate and parse the `.go.buildinfo` section or embedded build info markers.
    
    ## Value Proposition
    
    - **Module identification**: Reveals the Go module path (e.g., `github.com/user/project`)
    - **Version tracking**: Extracts Go compiler version and module versions
    - **Build flags**: Surfaces build tags, CGO settings, and GOEXPERIMENT flags
    - **VCS metadata**: Captures git commit hash, modified status, and build timestamp
    - **Structured data**: Go embeds this in a parseable format, not arbitrary strings
    - **Supply chain visibility**: Enables dependency analysis and vulnerability tracking
    - **Reproducibility**: Helps verify build provenance and integrity
    
    ## Technical Details
    
    ### Build Info Format
    
    Go 1.18+ embeds build information in a standardized format:
    - **Section**: `.go.buildinfo` (ELF/PE/Mach-O)
    - **Magic bytes**: `\xff Go build` (fallback marker)
    - **Structure**: Protobuf-like encoding with version, path, and key-value settings
    
    ### Data Available
    
    GoVersion:       go1.21.5
    Path:            github.com/user/project
    Main.Version:    v1.2.3
    Build.Settings:
      - CGO_ENABLED=1
      - GOARCH=amd64
      - GOOS=linux
      - vcs=git
      - vcs.revision=a1b2c3d4
      - vcs.time=2024-01-15T10:30:00Z
      - vcs.modified=false
    
    ## Proposed Implementation
    
    ### Phase 1: Parser Implementation
    
    1. **Dependency**: Use the `gobuild` crate or implement custom parser
       - `gobuild` crate provides ready-made buildinfo parsing
       - Alternative: Implement parser following Go's debug/buildinfo format
    
    2. **Section Location**:
       - ELF: Look for `.go.buildinfo` section
       - PE: Check for `.go.buildinfo` or `.gopclntab` section
       - Mach-O: Search in `__DATA` segment
       - Fallback: Scan for `\xff Go build` magic bytes in binary
    
    3. **Data Extraction**:
       - Parse buildinfo structure using format specification
       - Extract fields: `GoVersion`, `Path`, `Main.Version`, `Settings[]`
       - Handle VCS metadata: revision, timestamp, modified flag
    
    ### Phase 2: Integration
    
    4. **Create `ExtractionSource::GoBuildInfo`**:
       - New extraction source type for Go build metadata
       - Confidence score: 95+ (extremely high signal-to-noise ratio)
    
    5. **Emit Structured Strings**:
       - Each field as separate `ExtractedString`
       - Tags: `go-buildinfo`, `version`, `module`, `vcs`, `build-settings`
       - Include metadata: field name, value, confidence
    
    6. **CLI Support**:
       - Add `--only go-buildinfo` filter for quick Go binary identification
       - Consider `--go` flag that enables all Go-specific extractors
    
    ## Acceptance Criteria
    
    - [ ] Successfully extracts build info from Go 1.18+ binaries (ELF, PE, Mach-O)
    - [ ] Parses and emits all standard fields: version, path, main version, settings, VCS info
    - [ ] Handles binaries with missing or partial build info gracefully
    - [ ] Falls back to magic byte scanning when sections are missing
    - [ ] Achieves 95+ confidence score for extracted data
    - [ ] Supports `--only go-buildinfo` filter
    - [ ] Provides structured output with appropriate tags
    - [ ] Works with both statically and dynamically linked Go binaries
    - [ ] Handles older Go binaries (pre-1.18) with pclntab parsing
    
    ## Testing Strategy
    
    ### Test Binaries Needed
    
    1. **Modern Go binaries** (Go 1.18+):
       - Simple "Hello World" with build info
       - Binary with VCS metadata (git commit, timestamp)
       - Binary with custom build tags and settings
       - CGO-enabled binary
    
    2. **Edge cases**:
       - Stripped binary (symbol table removed)
       - Older Go binary (Go 1.16, 1.17)
       - Binary with modified/corrupted build info section
       - Binary built with `-trimpath` and `-buildvcs=false`
    
    3. **Multi-platform**:
       - Linux ELF (amd64, arm64)
       - Windows PE (amd64, 386)
       - macOS Mach-O (amd64, arm64)
    
    ### Test Cases
    
    - Verify correct extraction of all buildinfo fields
    - Validate confidence scoring
    - Test fallback mechanisms (magic byte scanning)
    - Ensure no false positives on non-Go binaries
    - Performance testing on large binaries
    
    ## Implementation Considerations
    
    - Go buildinfo format is stable across Go 1.18+
    - For older Go binaries, may need to fall back to pclntab parsing (more complex)
    - Consider memory-mapped file access for large binaries
    - Handle endianness for cross-platform support
    - Validate extracted data to prevent malformed input issues
    
    ## References
    
    - [Go Runtime Build Info](https://pkg.go.dev/runtime/debug#BuildInfo)
    - [Go Debug Buildinfo Format](https://pkg.go.dev/debug/buildinfo)
    - [`gobuild` crate](https://crates.io/crates/gobuild)
    - [Go Binary Format Specification](https://go.dev/doc/gccgo_install.html)
    
    ## Related Issues
    
    - Complements other binary analysis extractors
    - May integrate with existing section parsing logic
    - Synergizes with future dependency graph visualization features
    ENDBODY
    
    # Update the issue
    gh issue edit 64 \
      --repo EvilBit-Labs/StringyMcStringFace \
      --title "Implement Go Build Info Extraction for Binary Analysis" \
      --body-file /tmp/enhanced_issue.md
    
    # Add labels
    gh issue edit 64 \
      --repo EvilBit-Labs/StringyMcStringFace \
      --add-label "area:analyzer,lang:rust,needs:tests,priority:medium,MVP"
    
    # Assign to unclesp1d3r
    gh issue edit 64 \
      --repo EvilBit-Labs/StringyMcStringFace \
      --add-assignee unclesp1d3r
    
    echo "✓ Issue #64 has been enhanced successfully"
    echo ""
    echo "Updates applied:"
    echo "  • Title: 'Implement Go Build Info Extraction for Binary Analysis'"
    echo "  • Body: Comprehensive content with background, technical details, acceptance criteria, and testing strategy"
    echo "  • Labels: enhancement, area:analyzer, lang:rust, needs:tests, priority:medium, MVP"
    echo "  • Assigned to: unclesp1d3r"
    

    Length of output: 538

    ---

    @unclesp1d3r I've successfully enhanced issue #64 with comprehensive details and proper metadata. Here's what was updated:

    🎯 Title Enhancement

    New Title: "Implement Go Build Info Extraction for Binary Analysis"

    • More specific and action-oriented than the original "Go Build Info Detection"

    📝 Body Enhancements

    Added the following structured sections:

    1. Background - Context about Go binary metadata and its value for security analysis
    2. Description - Clear feature overview
    3. Value Proposition - Expanded with supply chain visibility and reproducibility benefits
    4. Technical Details - Added:
       • Build info format specification
       • Example data structure showing what can be extracted
    5. Proposed Implementation - Organized into two phases with detailed steps
    6. Acceptance Criteria - 9 actionable checkboxes for completion tracking
    7. Testing Strategy - Comprehensive test plan including:
       • Test binaries needed (modern Go, edge cases, multi-platform)
       • Specific test cases to validate functionality
    8. Implementation Considerations - Technical notes about stability, memory mapping, and endianness
    9. References - Links to official Go documentation and relevant crates
    10. Related Issues - Notes on integration with other features

    🏷️ Labels Applied

    • enhancement (already existed)
    • area:analyzer - Binary analyzer functionality
    • lang:rust - Rust implementation
    • needs:tests - Requires test coverage
    • priority:medium - Medium priority
    • MVP - Minimum viable product feature

    👤 Assignment

    • Assigned to: unclesp1d3r

    The issue is now ready for implementation with clear acceptance criteria, a comprehensive testing strategy, and all relevant technical context. You can view the enhanced issue at: #64
11. traycerai commented on Nov 10, 2025

    

    trayceraiBot

    on Nov 10, 2025 – with traycerai

    More actions

    I have updated the Implementation Plan to reflect the recent changes in the ticket.

    Previous Plan

    Observations

    The codebase has a well-structured architecture with container parsers for ELF, PE, and Mach-O that extract section metadata. The extraction and classification modules are currently empty placeholders. The StringSource enum needs a new variant for Go buildinfo. The Tag enum already has a Version tag that can be reused. Section data can be accessed using goblin by slicing the original binary data at section.offset for the given section.size. The Go buildinfo format is well-documented with a 16-byte header containing magic bytes \xff Go buildinf:, pointer size, and endianness flags, followed by either pointer-based or inline varint-encoded strings.

    Approach

    Add Go build info detection by extending the extraction system to parse the .go.buildinfo section (or __go_buildinfo for Mach-O, or scan writable sections for PE). Parse the structured buildinfo format to extract Go version, module path, build settings, and VCS metadata. Emit each field as a high-scoring FoundString with appropriate tags.

    Reasoning

    Explored the codebase structure, examined container parsers to understand the architecture, reviewed type definitions for FoundString and StringSource, researched Go buildinfo format specifications, checked how section data is accessed with goblin, and reviewed the testing infrastructure to understand integration patterns.

    Proposed File Changes

    📄 src/types.rs ^(MODIFY) 🔗

    Add a new variant GoBuildInfo to the StringSource enum (around line 62-75) to represent strings extracted from Go build information. This will be used to tag all strings extracted from the Go buildinfo section with a distinct source type.

    Add new tag variants to the Tag enum (around line 14-39) for Go-specific metadata:

    • Module - for Go module paths (e.g., github.com/user/project)
    • BuildSetting - for build flags and settings
    • VcsInfo - for VCS metadata (git commit, timestamp)
    • GoBuildInfo - general tag for Go buildinfo strings

    The existing Version tag can be reused for Go version strings.

    📄 src/extraction/mod.rs ^(MODIFY) 🔗

    
    

    References

    • 📄 src/types.rs ^(MODIFY)

    Transform this module from a placeholder into a proper extraction framework. Add a public module declaration for the new go_buildinfo submodule. Define a trait or function signature for extraction that takes binary data and ContainerInfo and returns a vector of FoundString instances. This will serve as the entry point for all extraction logic including Go buildinfo extraction.

    📄 src/extraction/go_buildinfo.rs ^(NEW) 🔗

    
    

    References

    • 📄 src/types.rs ^(MODIFY)
    • 📄 src/container/mod.rs

    Create a comprehensive Go buildinfo parser module with the following components:

    1. Constants: Define magic bytes \xff Go buildinf: (14 bytes), minimum size (32 bytes), alignment (16 bytes), and section names (.go.buildinfo for ELF, __go_buildinfo for Mach-O).

    2. Data structures: Create structs to represent the parsed buildinfo:

       • GoBuildInfoHeader - 16-byte header with magic, pointer size, endianness flags
       • GoBuildInfo - parsed result with go_version, module_path, main_version, build_settings (Vec of key-value pairs), and vcs_info (revision, time, modified flag)

    3. Section locator function: Implement logic to find the buildinfo section:

       • For ELF: Look for .go.buildinfo section in the sections list
       • For Mach-O: Look for __go_buildinfo section (format: __TEXT,__go_buildinfo)
       • For PE: Scan first writable section for magic bytes at 16-byte boundaries
       • Return section offset and size if found

    4. Magic scanner function: Implement a fallback scanner that searches for \xff Go buildinf: at 16-byte aligned offsets within a given data range. This handles cases where the section name isn't standard.

    5. Header parser: Parse the 16-byte header to extract:

       • Validate magic bytes
       • Read pointer size (byte 14: 0x04 or 0x08)
       • Read flags (byte 15: bit 0 for endianness, bit 1 for inline strings)
       • Return parsed header or error

    6. String extraction functions:

       • For pointer form: Follow pointers to read Go string structures (pointer + length), handling endianness and pointer size. Translate virtual addresses to file offsets using section information.
       • For inline form: Read varint-length-prefixed strings directly after the header.
       • Strip the 16-byte sentinels from module info if present.

    7. Module info parser: Parse the module info string which contains:

       • Module path and version
       • Dependency list (module@version)
       • Build settings (key=value pairs like -tags, -compiler, CGO_ENABLED, GOARCH, GOOS, GOEXPERIMENT)
       • VCS info (vcs, vcs.revision, vcs.time, vcs.modified)
         Parse this into structured fields.

    8. Main extraction function extract_go_buildinfo: Takes binary data slice, ContainerInfo, and returns Vec<FoundString>. Logic:

       • Locate buildinfo section using format-specific logic
       • If not found by section name, fall back to magic byte scanning
       • Parse header and validate
       • Extract build version and module info strings based on header flags
       • Parse module info into structured fields
       • Create FoundString instances for each field with:
         • source: StringSource::GoBuildInfo
         • score: 95 (high signal as specified in the issue)
         • Appropriate tags: GoBuildInfo + Version for go version, Module for module path, BuildSetting for build flags, VcsInfo for VCS metadata
         • offset from the section location
         • section name if available
       • Return all extracted strings

    9. Error handling: Use Result<Vec<FoundString>> and handle cases where buildinfo is not found (return empty vec), malformed (log warning and return partial results), or parsing fails.

    10. Helper functions: Add utilities for varint decoding, endianness handling, and address translation.

    📄 src/lib.rs ^(MODIFY) 🔗

    
    

    References

    • 📄 src/extraction/go_buildinfo.rs ^(NEW)

    Update the re-exports section (around line 51-54) to include the new Go buildinfo extraction functionality. Export the main extraction function from extraction::go_buildinfo module so it's accessible to library users. Update the module documentation comments (around line 39-42) to reflect that Go buildinfo extraction is now implemented.

    📄 src/main.rs ^(MODIFY) 🔗

    
    

    References

    • 📄 src/extraction/go_buildinfo.rs ^(NEW)
    • 📄 src/container/mod.rs
    • 📄 src/types.rs ^(MODIFY)

    Extend the Cli struct (around line 9-13) to add Go-specific command-line options:

    • --go flag to enable all Go-specific features
    • --only go-buildinfo support in the existing --only filter (this may require adding a general --only option if it doesn't exist)
    • Consider adding --go-buildinfo as a dedicated flag for quick Go binary identification

    In the main function (around line 15-23), implement the extraction pipeline:

    1. Read the binary file from the input path
    2. Detect format using detect_format from src/container/mod.rs
    3. Create appropriate parser using create_parser
    4. Parse the binary to get ContainerInfo
    5. Call extract_go_buildinfo with the binary data and container info
    6. Format and display the results (for now, simple println output is fine)
    7. Handle errors gracefully with informative messages

    This provides a working end-to-end demonstration of the Go buildinfo extraction feature.

    📄 Cargo.toml ^(MODIFY) 🔗

    No additional dependencies are required. The existing goblin crate provides all necessary binary parsing capabilities. The serde and serde_json crates are already available for serialization if needed. The implementation will use standard library features for varint decoding and byte manipulation. Verify that the current goblin version (0.10.3) supports all needed features for section access.

    📄 tests/fixtures/test_go_binary ^(NEW) 🔗

    Create a simple Go test binary fixture for integration testing. This should be a minimal Go program (e.g., a simple "hello world") compiled with Go 1.18+ to ensure it contains the .go.buildinfo section. The binary should be built with module mode enabled and include some build tags or settings for comprehensive testing. Document the build command in the fixtures README.

    📄 tests/fixtures/test_go_binary.go ^(NEW) 🔗

    Create a minimal Go source file for the test fixture:

    package main
    
    import "fmt"
    
    func main() {
        fmt.Println("Go buildinfo test binary")
    }

    This will be compiled into the test_go_binary fixture. Keep it simple to ensure consistent buildinfo across different build environments.

    📄 tests/fixtures/README.md ^(MODIFY) 🔗

    
    

    References

    • 📄 tests/fixtures/test_go_binary.go ^(NEW)

    Add documentation for the new Go binary fixture (around line 9-10, after the existing fixtures list):

    • test_go_binary - Go binary with buildinfo (ELF format)

    Add a new section "Go Binary (ELF)" after the PE section (around line 36-39) with build instructions:

    cd tests/fixtures
    go mod init example.com/testbinary
    go build -o test_go_binary test_go_binary.go

    Note that the binary should be built with Go 1.18+ and include build metadata. Mention that the fixture should be rebuilt if the Go version changes significantly.

    📄 tests/integration_go_buildinfo.rs ^(NEW) 🔗

    
    

    References

    • 📄 tests/integration_elf.rs
    • 📄 src/extraction/go_buildinfo.rs ^(NEW)
    • 📄 tests/fixtures/test_go_binary ^(NEW)

    Create comprehensive integration tests for Go buildinfo extraction following the pattern from tests/integration_elf.rs:

    1. Helper function get_fixture_path - reuse the same pattern to locate test fixtures

    2. Test: test_go_buildinfo_detection - Verify that the Go binary fixture is detected correctly and contains buildinfo:

       • Read the test_go_binary fixture
       • Call extract_go_buildinfo with the binary data
       • Assert that results are not empty
       • Verify at least one string has StringSource::GoBuildInfo

    3. Test: test_go_buildinfo_fields - Verify specific fields are extracted:

       • Extract buildinfo from fixture
       • Check for Go version string (should match pattern like "go1.x.x")
       • Check for module path (should be "example.com/testbinary" or similar)
       • Verify that extracted strings have appropriate tags (Version, Module, etc.)

    4. Test: test_go_buildinfo_scoring - Verify high scoring:

       • Extract buildinfo
       • Assert all Go buildinfo strings have score >= 95 as specified in the issue

    5. Test: test_go_buildinfo_section_location - Verify section metadata:

       • Extract buildinfo
       • Check that strings have proper offset and section information
       • For ELF, verify section name is ".go.buildinfo"

    6. Test: test_go_buildinfo_not_present - Verify graceful handling when buildinfo is absent:

       • Use one of the existing non-Go fixtures (test_binary_elf)
       • Call extract_go_buildinfo
       • Assert that it returns an empty vector without errors

    7. Test: test_go_buildinfo_snapshot - Create a snapshot test for consistent output:

       • Extract buildinfo from fixture
       • Format the output similar to test_elf_symbol_extraction_snapshot
       • Use insta::assert_snapshot! to capture the output
       • This ensures buildinfo extraction remains consistent across changes

    Use the existing test infrastructure (insta for snapshots, standard assertions) and follow the same patterns as the ELF integration tests for consistency.

    📄 docs/src/string-extraction.md ^(MODIFY) 🔗

    
    

    References

    • 📄 src/extraction/go_buildinfo.rs ^(NEW)

    Add a new section "Go Build Information Extraction" after the "Resource Sections" section (around line 202). Document:

    1. Overview: Explain that Go binaries embed structured build metadata in the .go.buildinfo section (ELF) or __go_buildinfo (Mach-O) or within writable sections (PE).

    2. Format Details: Describe the buildinfo format:

       • Magic bytes: \xff Go buildinf:
       • 16-byte header with pointer size and endianness
       • Two forms: pointer-based and inline varint-encoded
       • Contains Go version, module path, dependencies, build settings, and VCS info

    3. Extraction Strategy: Explain the approach:

       • Locate section by name (format-specific)
       • Fall back to magic byte scanning if section not found
       • Parse header to determine string format
       • Extract and parse structured data
       • Emit each field as a separate high-scoring string

    4. Extracted Fields: List what gets extracted:

       • Go compiler version (tagged with Version)
       • Module path (tagged with Module)
       • Build settings like -tags, CGO_ENABLED, GOARCH (tagged with BuildSetting)
       • VCS metadata: commit hash, timestamp, modified status (tagged with VcsInfo)

    5. Scoring: Note that Go buildinfo strings receive a score of 95+ due to their high signal value for identifying and analyzing Go binaries.

    6. Code Example: Provide a simple example showing how to call the extraction function (similar to the PE resources example around line 186-201).

    📄 docs/src/cli.md ^(MODIFY) 🔗

    Add a new subsection "Go Options" in the "Format-Specific Options" section (after line 85, following the Mach-O options):

    ### Go Options
    
    | Option | Description |
    | --- | --- |
    | `--go` | Enable all Go-specific extraction features |
    | `--go-buildinfo` | Extract Go build information only |
    | `--only go-buildinfo` | Filter to show only Go buildinfo strings |

    Add Go-related tags to the "Available Tags" table (around line 115-132):

    • module - Go module paths (e.g., github.com/user/project)
    • build-setting - Go build flags and settings
    • vcs-info - VCS metadata from Go buildinfo
    • go-buildinfo - General Go build information

    Add an example in the "Tag Filtering" examples section (around line 135-144):

    # Go binary analysis
    stringy --only module,version,vcs-info go_binary

    Diagram

    sequenceDiagram
        participant CLI as CLI (main.rs)
        participant Container as Container Parser
        participant Extractor as Go BuildInfo Extractor
        participant Binary as Binary Data
        
        CLI->>Binary: Read file
        CLI->>Container: detect_format(data)
        Container-->>CLI: BinaryFormat
        CLI->>Container: create_parser(format)
        Container-->>CLI: Parser instance
        CLI->>Container: parse(data)
        Container->>Binary: Extract sections metadata
        Container-->>CLI: ContainerInfo
        
        CLI->>Extractor: extract_go_buildinfo(data, container_info)
        
        Extractor->>Container: Locate .go.buildinfo section
        alt Section found by name
            Extractor->>Binary: Read section at offset
        else Section not found
            Extractor->>Binary: Scan for magic bytes
        end
        
        Extractor->>Extractor: Parse 16-byte header
        Extractor->>Extractor: Validate magic bytes
        
        alt Inline strings (bit 1 set)
            Extractor->>Binary: Read varint-prefixed strings
        else Pointer form
            Extractor->>Binary: Follow pointers to strings
        end
        
        Extractor->>Extractor: Parse module info
        Extractor->>Extractor: Extract fields (version, module, settings, VCS)
        
        loop For each field
            Extractor->>Extractor: Create FoundString with score=95
            Extractor->>Extractor: Add appropriate tags
        end
        
        Extractor-->>CLI: Vec<FoundString>
        CLI->>CLI: Format and display results
    

    Loading

    Import In IDE

    🤖 Prompt for AI Agents

    I have created the following plan after thorough exploration and analysis of the codebase. Follow the below plan verbatim. Trust the files and references. Do not re-verify what's written in the plan. Explore only when absolutely necessary. First implement all the proposed file changes and then I'll review all the changes together at the end.
    
    ### Observations
    
    The codebase has a well-structured architecture with container parsers for ELF, PE, and Mach-O that extract section metadata. The extraction and classification modules are currently empty placeholders. The `StringSource` enum needs a new variant for Go buildinfo. The `Tag` enum already has a `Version` tag that can be reused. Section data can be accessed using goblin by slicing the original binary data at `section.offset` for the given `section.size`. The Go buildinfo format is well-documented with a 16-byte header containing magic bytes `\xff Go buildinf:`, pointer size, and endianness flags, followed by either pointer-based or inline varint-encoded strings.
    
    ### Approach
    
    Add Go build info detection by extending the extraction system to parse the `.go.buildinfo` section (or `__go_buildinfo` for Mach-O, or scan writable sections for PE). Parse the structured buildinfo format to extract Go version, module path, build settings, and VCS metadata. Emit each field as a high-scoring `FoundString` with appropriate tags.
    
    ### Reasoning
    
    Explored the codebase structure, examined container parsers to understand the architecture, reviewed type definitions for `FoundString` and `StringSource`, researched Go buildinfo format specifications, checked how section data is accessed with goblin, and reviewed the testing infrastructure to understand integration patterns.
    
    ## Mermaid Diagram
    
    sequenceDiagram
        participant CLI as CLI (main.rs)
        participant Container as Container Parser
        participant Extractor as Go BuildInfo Extractor
        participant Binary as Binary Data
        
        CLI->>Binary: Read file
        CLI->>Container: detect_format(data)
        Container-->>CLI: BinaryFormat
        CLI->>Container: create_parser(format)
        Container-->>CLI: Parser instance
        CLI->>Container: parse(data)
        Container->>Binary: Extract sections metadata
        Container-->>CLI: ContainerInfo
        
        CLI->>Extractor: extract_go_buildinfo(data, container_info)
        
        Extractor->>Container: Locate .go.buildinfo section
        alt Section found by name
            Extractor->>Binary: Read section at offset
        else Section not found
            Extractor->>Binary: Scan for magic bytes
        end
        
        Extractor->>Extractor: Parse 16-byte header
        Extractor->>Extractor: Validate magic bytes
        
        alt Inline strings (bit 1 set)
            Extractor->>Binary: Read varint-prefixed strings
        else Pointer form
            Extractor->>Binary: Follow pointers to strings
        end
        
        Extractor->>Extractor: Parse module info
        Extractor->>Extractor: Extract fields (version, module, settings, VCS)
        
        loop For each field
            Extractor->>Extractor: Create FoundString with score=95
            Extractor->>Extractor: Add appropriate tags
        end
        
        Extractor-->>CLI: Vec<FoundString>
        CLI->>CLI: Format and display results
    
    ## Proposed File Changes
    
    ### src/types.rs(MODIFY)
    
    Add a new variant `GoBuildInfo` to the `StringSource` enum (around line 62-75) to represent strings extracted from Go build information. This will be used to tag all strings extracted from the Go buildinfo section with a distinct source type.
    
    Add new tag variants to the `Tag` enum (around line 14-39) for Go-specific metadata:
    - `Module` - for Go module paths (e.g., `github.com/user/project`)
    - `BuildSetting` - for build flags and settings
    - `VcsInfo` - for VCS metadata (git commit, timestamp)
    - `GoBuildInfo` - general tag for Go buildinfo strings
    
    The existing `Version` tag can be reused for Go version strings.
    
    ### src/extraction/mod.rs(MODIFY)
    
    References: 
    
    - src/types.rs(MODIFY)
    
    Transform this module from a placeholder into a proper extraction framework. Add a public module declaration for the new `go_buildinfo` submodule. Define a trait or function signature for extraction that takes binary data and `ContainerInfo` and returns a vector of `FoundString` instances. This will serve as the entry point for all extraction logic including Go buildinfo extraction.
    
    ### src/extraction/go_buildinfo.rs(NEW)
    
    References: 
    
    - src/types.rs(MODIFY)
    - src/container/mod.rs
    
    Create a comprehensive Go buildinfo parser module with the following components:
    
    1. **Constants**: Define magic bytes `\xff Go buildinf:` (14 bytes), minimum size (32 bytes), alignment (16 bytes), and section names (`.go.buildinfo` for ELF, `__go_buildinfo` for Mach-O).
    
    2. **Data structures**: Create structs to represent the parsed buildinfo:
       - `GoBuildInfoHeader` - 16-byte header with magic, pointer size, endianness flags
       - `GoBuildInfo` - parsed result with go_version, module_path, main_version, build_settings (Vec of key-value pairs), and vcs_info (revision, time, modified flag)
    
    3. **Section locator function**: Implement logic to find the buildinfo section:
       - For ELF: Look for `.go.buildinfo` section in the sections list
       - For Mach-O: Look for `__go_buildinfo` section (format: `__TEXT,__go_buildinfo`)
       - For PE: Scan first writable section for magic bytes at 16-byte boundaries
       - Return section offset and size if found
    
    4. **Magic scanner function**: Implement a fallback scanner that searches for `\xff Go buildinf:` at 16-byte aligned offsets within a given data range. This handles cases where the section name isn't standard.
    
    5. **Header parser**: Parse the 16-byte header to extract:
       - Validate magic bytes
       - Read pointer size (byte 14: 0x04 or 0x08)
       - Read flags (byte 15: bit 0 for endianness, bit 1 for inline strings)
       - Return parsed header or error
    
    6. **String extraction functions**:
       - For pointer form: Follow pointers to read Go string structures (pointer + length), handling endianness and pointer size. Translate virtual addresses to file offsets using section information.
       - For inline form: Read varint-length-prefixed strings directly after the header.
       - Strip the 16-byte sentinels from module info if present.
    
    7. **Module info parser**: Parse the module info string which contains:
       - Module path and version
       - Dependency list (module@version)
       - Build settings (key=value pairs like `-tags`, `-compiler`, `CGO_ENABLED`, `GOARCH`, `GOOS`, `GOEXPERIMENT`)
       - VCS info (vcs, vcs.revision, vcs.time, vcs.modified)
       Parse this into structured fields.
    
    8. **Main extraction function** `extract_go_buildinfo`: Takes binary data slice, `ContainerInfo`, and returns `Vec<FoundString>`. Logic:
       - Locate buildinfo section using format-specific logic
       - If not found by section name, fall back to magic byte scanning
       - Parse header and validate
       - Extract build version and module info strings based on header flags
       - Parse module info into structured fields
       - Create `FoundString` instances for each field with:
         - `source: StringSource::GoBuildInfo`
         - `score: 95` (high signal as specified in the issue)
         - Appropriate tags: `GoBuildInfo` + `Version` for go version, `Module` for module path, `BuildSetting` for build flags, `VcsInfo` for VCS metadata
         - `offset` from the section location
         - `section` name if available
       - Return all extracted strings
    
    9. **Error handling**: Use `Result<Vec<FoundString>>` and handle cases where buildinfo is not found (return empty vec), malformed (log warning and return partial results), or parsing fails.
    
    10. **Helper functions**: Add utilities for varint decoding, endianness handling, and address translation.
    
    ### src/lib.rs(MODIFY)
    
    References: 
    
    - src/extraction/go_buildinfo.rs(NEW)
    
    Update the re-exports section (around line 51-54) to include the new Go buildinfo extraction functionality. Export the main extraction function from `extraction::go_buildinfo` module so it's accessible to library users. Update the module documentation comments (around line 39-42) to reflect that Go buildinfo extraction is now implemented.
    
    ### src/main.rs(MODIFY)
    
    References: 
    
    - src/extraction/go_buildinfo.rs(NEW)
    - src/container/mod.rs
    - src/types.rs(MODIFY)
    
    Extend the `Cli` struct (around line 9-13) to add Go-specific command-line options:
    - `--go` flag to enable all Go-specific features
    - `--only go-buildinfo` support in the existing `--only` filter (this may require adding a general `--only` option if it doesn't exist)
    - Consider adding `--go-buildinfo` as a dedicated flag for quick Go binary identification
    
    In the `main` function (around line 15-23), implement the extraction pipeline:
    1. Read the binary file from the input path
    2. Detect format using `detect_format` from `src/container/mod.rs`
    3. Create appropriate parser using `create_parser`
    4. Parse the binary to get `ContainerInfo`
    5. Call `extract_go_buildinfo` with the binary data and container info
    6. Format and display the results (for now, simple println output is fine)
    7. Handle errors gracefully with informative messages
    
    This provides a working end-to-end demonstration of the Go buildinfo extraction feature.
    
    ### Cargo.toml(MODIFY)
    
    No additional dependencies are required. The existing `goblin` crate provides all necessary binary parsing capabilities. The `serde` and `serde_json` crates are already available for serialization if needed. The implementation will use standard library features for varint decoding and byte manipulation. Verify that the current `goblin` version (0.10.3) supports all needed features for section access.
    
    ### tests/fixtures/test_go_binary(NEW)
    
    Create a simple Go test binary fixture for integration testing. This should be a minimal Go program (e.g., a simple "hello world") compiled with Go 1.18+ to ensure it contains the `.go.buildinfo` section. The binary should be built with module mode enabled and include some build tags or settings for comprehensive testing. Document the build command in the fixtures README.
    
    ### tests/fixtures/test_go_binary.go(NEW)
    
    Create a minimal Go source file for the test fixture:
    ```go
    package main
    
    import "fmt"
    
    func main() {
        fmt.Println("Go buildinfo test binary")
    }
    ```
    
    This will be compiled into the test_go_binary fixture. Keep it simple to ensure consistent buildinfo across different build environments.
    
    ### tests/fixtures/README.md(MODIFY)
    
    References: 
    
    - tests/fixtures/test_go_binary.go(NEW)
    
    Add documentation for the new Go binary fixture (around line 9-10, after the existing fixtures list):
    - `test_go_binary` - Go binary with buildinfo (ELF format)
    
    Add a new section "Go Binary (ELF)" after the PE section (around line 36-39) with build instructions:
    ```bash
    cd tests/fixtures
    go mod init example.com/testbinary
    go build -o test_go_binary test_go_binary.go
    ```
    
    Note that the binary should be built with Go 1.18+ and include build metadata. Mention that the fixture should be rebuilt if the Go version changes significantly.
    
    ### tests/integration_go_buildinfo.rs(NEW)
    
    References: 
    
    - tests/integration_elf.rs
    - src/extraction/go_buildinfo.rs(NEW)
    - tests/fixtures/test_go_binary(NEW)
    
    Create comprehensive integration tests for Go buildinfo extraction following the pattern from `tests/integration_elf.rs`:
    
    1. **Helper function** `get_fixture_path` - reuse the same pattern to locate test fixtures
    
    2. **Test: `test_go_buildinfo_detection`** - Verify that the Go binary fixture is detected correctly and contains buildinfo:
       - Read the test_go_binary fixture
       - Call `extract_go_buildinfo` with the binary data
       - Assert that results are not empty
       - Verify at least one string has `StringSource::GoBuildInfo`
    
    3. **Test: `test_go_buildinfo_fields`** - Verify specific fields are extracted:
       - Extract buildinfo from fixture
       - Check for Go version string (should match pattern like "go1.x.x")
       - Check for module path (should be "example.com/testbinary" or similar)
       - Verify that extracted strings have appropriate tags (Version, Module, etc.)
    
    4. **Test: `test_go_buildinfo_scoring`** - Verify high scoring:
       - Extract buildinfo
       - Assert all Go buildinfo strings have score >= 95 as specified in the issue
    
    5. **Test: `test_go_buildinfo_section_location`** - Verify section metadata:
       - Extract buildinfo
       - Check that strings have proper offset and section information
       - For ELF, verify section name is ".go.buildinfo"
    
    6. **Test: `test_go_buildinfo_not_present`** - Verify graceful handling when buildinfo is absent:
       - Use one of the existing non-Go fixtures (test_binary_elf)
       - Call `extract_go_buildinfo`
       - Assert that it returns an empty vector without errors
    
    7. **Test: `test_go_buildinfo_snapshot`** - Create a snapshot test for consistent output:
       - Extract buildinfo from fixture
       - Format the output similar to `test_elf_symbol_extraction_snapshot`
       - Use `insta::assert_snapshot!` to capture the output
       - This ensures buildinfo extraction remains consistent across changes
    
    Use the existing test infrastructure (insta for snapshots, standard assertions) and follow the same patterns as the ELF integration tests for consistency.
    
    ### docs/src/string-extraction.md(MODIFY)
    
    References: 
    
    - src/extraction/go_buildinfo.rs(NEW)
    
    Add a new section "Go Build Information Extraction" after the "Resource Sections" section (around line 202). Document:
    
    1. **Overview**: Explain that Go binaries embed structured build metadata in the `.go.buildinfo` section (ELF) or `__go_buildinfo` (Mach-O) or within writable sections (PE).
    
    2. **Format Details**: Describe the buildinfo format:
       - Magic bytes: `\xff Go buildinf:`
       - 16-byte header with pointer size and endianness
       - Two forms: pointer-based and inline varint-encoded
       - Contains Go version, module path, dependencies, build settings, and VCS info
    
    3. **Extraction Strategy**: Explain the approach:
       - Locate section by name (format-specific)
       - Fall back to magic byte scanning if section not found
       - Parse header to determine string format
       - Extract and parse structured data
       - Emit each field as a separate high-scoring string
    
    4. **Extracted Fields**: List what gets extracted:
       - Go compiler version (tagged with Version)
       - Module path (tagged with Module)
       - Build settings like -tags, CGO_ENABLED, GOARCH (tagged with BuildSetting)
       - VCS metadata: commit hash, timestamp, modified status (tagged with VcsInfo)
    
    5. **Scoring**: Note that Go buildinfo strings receive a score of 95+ due to their high signal value for identifying and analyzing Go binaries.
    
    6. **Code Example**: Provide a simple example showing how to call the extraction function (similar to the PE resources example around line 186-201).
    
    ### docs/src/cli.md(MODIFY)
    
    Add a new subsection "Go Options" in the "Format-Specific Options" section (after line 85, following the Mach-O options):
    
    ```markdown
    ### Go Options
    
    | Option | Description |
    | --- | --- |
    | `--go` | Enable all Go-specific extraction features |
    | `--go-buildinfo` | Extract Go build information only |
    | `--only go-buildinfo` | Filter to show only Go buildinfo strings |
    ```
    
    Add Go-related tags to the "Available Tags" table (around line 115-132):
    - `module` - Go module paths (e.g., `github.com/user/project`)
    - `build-setting` - Go build flags and settings
    - `vcs-info` - VCS metadata from Go buildinfo
    - `go-buildinfo` - General Go build information
    
    Add an example in the "Tag Filtering" examples section (around line 135-144):
    ```bash
    # Go binary analysis
    stringy --only module,version,vcs-info go_binary
    ```

    ---

    Developer Humor

    🔍 Searching through binaries, byte by byte,\n> Found some Go strings, oh my, oh my!\n> With magic bytes and buildinfo galore,\n> Version, module, and VCS info to explore.\n> Score them high at ninety-five,\n> These Go strings really come alive! 🎯

    ---

    Execution Information

    Branch: main
    Commit: bdd6206

    New Plan

    Observations

    The codebase provides a solid foundation with goblin-based container parsing for ELF, PE, and Mach-O formats, including section classification and import/export extraction. The extraction module is currently empty, ready for new extractors. types.rs defines FoundString, StringSource, and Tag enums that need extension for Go-specific metadata. No existing Go buildinfo parsing; a custom implementation is required following Go's debug/buildinfo format specification. Test fixtures and integration tests exist for other formats, providing patterns to follow.

    Approach

    Implement a custom Go buildinfo parser in a new extraction/go_buildinfo.rs module. Locate the buildinfo section by name (.go.buildinfo for ELF/Mach-O, scan writable sections for PE) or fallback to magic byte scanning (\xff Go buildinf:). Parse the 16-byte header for pointer size, endianness, and string format (pointer vs. inline). Extract Go version and module info strings, then parse module info into structured fields (version, path, settings, VCS). Emit each as high-score FoundString with StringSource::GoBuildInfo and appropriate tags. Integrate into CLI with --go-buildinfo filter and update docs/tests.

    Reasoning

    I examined the repository structure to understand the project layout. I reviewed the core type definitions to identify necessary extensions for new sources and tags. I analyzed the container parsing modules to see how sections are accessed and classified. I inspected the empty extraction module to plan its expansion. I researched Go buildinfo format details and confirmed no suitable existing Rust crate exists, necessitating a custom parser. I studied existing test patterns for integration testing guidance.

    Proposed File Changes

    📄 src/types.rs ^(MODIFY) 🔗

    Extend the StringSource enum (lines 62-75) by adding a new variant GoBuildInfo to represent strings extracted from Go build information sections.

    Extend the Tag enum (lines 14-39) with new variants for Go-specific classification:

    • Module for Go module paths
    • BuildSetting for build flags and environment variables
    • VcsInfo for version control metadata (revision, timestamp)
    • GoBuildInfo as a general tag for all buildinfo strings

    The existing Version tag will be reused for Go compiler versions. Ensure all new variants implement Serialize and Deserialize with appropriate serde attributes if needed for JSON output.

    📄 src/extraction/mod.rs ^(MODIFY) 🔗

    
    

    References

    • 📄 src/extraction/go_buildinfo.rs ^(NEW)
    • 📄 src/types.rs ^(MODIFY)

    Replace the placeholder comment with a proper module declaration including pub mod go_buildinfo;. Add a public function pub fn extract_all(container_info: &ContainerInfo, data: &[u8]) -> Vec<FoundString> that dispatches to format-specific extractors, starting with Go buildinfo. For now, it can call go_buildinfo::extract_go_buildinfo(container_info, data) and return the results. This sets up the framework for future extractors like symbols or resources.

    📄 src/extraction/go_buildinfo.rs ^(NEW) 🔗

    
    

    References

    • 📄 src/types.rs ^(MODIFY)
    • 📄 src/container/mod.rs

    Implement a complete Go buildinfo extraction module.

    Define constants: magic bytes [0xff, b'G', b'o', b' ', b'b', b'u', b'i', b'l', b'd', b'i', b'n', b'f', b':'], header size 16 bytes, section names .go.buildinfo (ELF), __go_buildinfo,__data (Mach-O).

    Create structs: BuildInfoHeader (magic validation, ptr_size: u8, flags: u8), BuildInfo (goversion: String, path: String, main_version: Option, deps: Vec, settings: Vec<(String, String)>, vcs: Option).

    Implement locate_buildinfo_section(container_info: &ContainerInfo) -> Option<(u64, u64)> to find section by name or scan for magic in writable sections.

    Implement parse_header(data: &[u8]) -> Result<BuildInfoHeader> to read and validate header.

    Implement extract_strings(header: &BuildInfoHeader, section_data: &[u8], base_offset: u64) -> Vec<FoundString> handling pointer-based (follow ptr+len) or inline varint strings, parsing module info format (path@version; deps; settings; vcs).

    Main function pub fn extract_go_buildinfo(container_info: &ContainerInfo, data: &[u8]) -> Vec<FoundString>: locate section, read data slice, parse header, extract/parse fields, create FoundString for each (text=field value, source=GoBuildInfo, score=95, tags=[GoBuildInfo, relevant tag like Version/Module], offset=calculated, section=section.name).

    Handle errors gracefully, returning empty vec if not found. Use little-endian by default, adjust for flags.

    📄 src/lib.rs ^(MODIFY) 🔗

    
    

    References

    • 📄 src/extraction/go_buildinfo.rs ^(NEW)
    • 📄 src/extraction/mod.rs ^(MODIFY)

    Update module documentation (lines 34-42) to note that Go buildinfo extraction is now implemented in the extraction module.

    Add re-export pub use extraction::go_buildinfo; to make the extractor publicly available.

    Update the basic usage example (lines 19-32) to demonstrate calling extraction::extract_all(&container_info, &data) after parsing the container.

    📄 src/main.rs ^(MODIFY) 🔗

    
    

    References

    • 📄 src/extraction/mod.rs ^(MODIFY)
    • 📄 src/types.rs ^(MODIFY)
    • 📄 src/lib.rs ^(MODIFY)

    Enhance the CLI to support Go buildinfo extraction.

    Add clap derives or matches for flags: --go (enable Go features), --only go-buildinfo (filter to only Go strings).

    In main, after parsing container: call extraction::extract_all(&container_info, &data) to get Vec<FoundString>, then filter based on flags (e.g., if --only go-buildinfo, keep only those with source GoBuildInfo).

    Implement simple output: for each string, print offset, score, tags, source, text (formatted by length).

    Add error handling for unsupported formats.

    📄 Cargo.toml ^(MODIFY) 🔗

    No new dependencies required; goblin already handles binary parsing. Ensure goblin = "0.6" or latest compatible version supports all needed ELF/PE/Mach-O features. Add dev-dependency insta if not present for snapshot testing.

    📄 tests/fixtures/test_go_buildinfo_elf ^(NEW) 🔗

    Add a test fixture: compile a simple Go program (e.g., package main; import "fmt"; func main() { fmt.Println("Hello Go!") }) with go build -o test_go_buildinfo_elf -ldflags='-buildvcs=false' to include buildinfo section without VCS. Ensure it's ELF amd64 Linux.

    📄 tests/fixtures/README.md ^(MODIFY) 🔗

    
    

    References

    • 📄 tests/fixtures/test_go_buildinfo_elf ^(NEW)

    Update the fixtures list to include the new Go binary fixture and build instructions: go mod init test; go build -o test_go_buildinfo_elf main.go. Note platforms and Go version requirements (1.18+).

    📄 tests/integration_go_buildinfo.rs ^(NEW) 🔗

    
    

    References

    • 📄 tests/integration_elf.rs
    • 📄 src/extraction/go_buildinfo.rs ^(NEW)
    • 📄 tests/fixtures/test_go_buildinfo_elf ^(NEW)

    Create integration tests mirroring integration_elf.rs.

    Test detection: load fixture, extract, assert non-empty with source == GoBuildInfo.

    Test fields: assert presence of Go version (matches "go1.*"), module path, settings like GOOS/GOARCH.

    Test scoring: all Go strings have score >=95.

    Test fallback: on non-Go binary, returns empty.

    Test malformed: modify fixture header, ensure graceful empty return.

    Snapshot test: capture formatted output of extracted strings.

    📄 docs/src/string-extraction.md ^(MODIFY) 🔗

    
    

    References

    • 📄 src/extraction/go_buildinfo.rs ^(NEW)

    Add a new section 'Go Buildinfo Extraction' after 'Import/Export Names'.

    Describe the format: magic bytes, header, string extraction (pointer/inline), module info parsing.

    List extracted fields: GoVersion (tag: Version), Path (Module), Settings (BuildSetting), VCS (VcsInfo).

    Explain location strategy: section name search + magic scan fallback.

    Provide usage example: stringy --only go-buildinfo binary.

    Note high confidence (95+) due to structured nature.

    📄 docs/src/cli.md ^(MODIFY) 🔗

    
    

    References

    • 📄 src/main.rs ^(MODIFY)

    In 'Usage' section, add examples for Go extraction: stringy go_binary --go and stringy go_binary --only go-buildinfo.

    In 'Options' table, add --go (enable Go extractors) and extend --only to support go-buildinfo.

    In 'Tags' section, document new tags: module, build-setting, vcs-info, go-buildinfo.

    Import In IDE

    🤖 Prompt for AI Agents

    I have created the following plan after thorough exploration and analysis of the codebase. Follow the below plan verbatim. Trust the files and references. Do not re-verify what's written in the plan. Explore only when absolutely necessary. First implement all the proposed file changes and then I'll review all the changes together at the end.
    
    ### Observations
    
    The codebase provides a solid foundation with goblin-based container parsing for ELF, PE, and Mach-O formats, including section classification and import/export extraction. The `extraction` module is currently empty, ready for new extractors. `types.rs` defines `FoundString`, `StringSource`, and `Tag` enums that need extension for Go-specific metadata. No existing Go buildinfo parsing; a custom implementation is required following Go's debug/buildinfo format specification. Test fixtures and integration tests exist for other formats, providing patterns to follow.
    
    ### Approach
    
    Implement a custom Go buildinfo parser in a new `extraction/go_buildinfo.rs` module. Locate the buildinfo section by name (`.go.buildinfo` for ELF/Mach-O, scan writable sections for PE) or fallback to magic byte scanning (`\xff Go buildinf:`). Parse the 16-byte header for pointer size, endianness, and string format (pointer vs. inline). Extract Go version and module info strings, then parse module info into structured fields (version, path, settings, VCS). Emit each as high-score `FoundString` with `StringSource::GoBuildInfo` and appropriate tags. Integrate into CLI with `--go-buildinfo` filter and update docs/tests.
    
    ### Reasoning
    
    I examined the repository structure to understand the project layout. I reviewed the core type definitions to identify necessary extensions for new sources and tags. I analyzed the container parsing modules to see how sections are accessed and classified. I inspected the empty extraction module to plan its expansion. I researched Go buildinfo format details and confirmed no suitable existing Rust crate exists, necessitating a custom parser. I studied existing test patterns for integration testing guidance.
    
    ## Proposed File Changes
    
    ### src/types.rs(MODIFY)
    
    Extend the `StringSource` enum (lines 62-75) by adding a new variant `GoBuildInfo` to represent strings extracted from Go build information sections.
    
    Extend the `Tag` enum (lines 14-39) with new variants for Go-specific classification:
    - `Module` for Go module paths
    - `BuildSetting` for build flags and environment variables
    - `VcsInfo` for version control metadata (revision, timestamp)
    - `GoBuildInfo` as a general tag for all buildinfo strings
    
    The existing `Version` tag will be reused for Go compiler versions. Ensure all new variants implement `Serialize` and `Deserialize` with appropriate `serde` attributes if needed for JSON output.
    
    ### src/extraction/mod.rs(MODIFY)
    
    References: 
    
    - src/extraction/go_buildinfo.rs(NEW)
    - src/types.rs(MODIFY)
    
    Replace the placeholder comment with a proper module declaration including `pub mod go_buildinfo;`. Add a public function `pub fn extract_all(container_info: &ContainerInfo, data: &[u8]) -> Vec<FoundString>` that dispatches to format-specific extractors, starting with Go buildinfo. For now, it can call `go_buildinfo::extract_go_buildinfo(container_info, data)` and return the results. This sets up the framework for future extractors like symbols or resources.
    
    ### src/extraction/go_buildinfo.rs(NEW)
    
    References: 
    
    - src/types.rs(MODIFY)
    - src/container/mod.rs
    
    Implement a complete Go buildinfo extraction module.
    
    Define constants: magic bytes `[0xff, b'G', b'o', b' ', b'b', b'u', b'i', b'l', b'd', b'i', b'n', b'f', b':']`, header size 16 bytes, section names `.go.buildinfo` (ELF), `__go_buildinfo,__data` (Mach-O).
    
    Create structs: `BuildInfoHeader` (magic validation, ptr_size: u8, flags: u8), `BuildInfo` (goversion: String, path: String, main_version: Option<String>, deps: Vec<String>, settings: Vec<(String, String)>, vcs: Option<VcsInfo>).
    
    Implement `locate_buildinfo_section(container_info: &ContainerInfo) -> Option<(u64, u64)>` to find section by name or scan for magic in writable sections.
    
    Implement `parse_header(data: &[u8]) -> Result<BuildInfoHeader>` to read and validate header.
    
    Implement `extract_strings(header: &BuildInfoHeader, section_data: &[u8], base_offset: u64) -> Vec<FoundString>` handling pointer-based (follow ptr+len) or inline varint strings, parsing module info format (path@version; deps; settings; vcs).
    
    Main function `pub fn extract_go_buildinfo(container_info: &ContainerInfo, data: &[u8]) -> Vec<FoundString>`: locate section, read data slice, parse header, extract/parse fields, create `FoundString` for each (text=field value, source=GoBuildInfo, score=95, tags=[GoBuildInfo, relevant tag like Version/Module], offset=calculated, section=section.name).
    
    Handle errors gracefully, returning empty vec if not found. Use little-endian by default, adjust for flags.
    
    ### src/lib.rs(MODIFY)
    
    References: 
    
    - src/extraction/go_buildinfo.rs(NEW)
    - src/extraction/mod.rs(MODIFY)
    
    Update module documentation (lines 34-42) to note that Go buildinfo extraction is now implemented in the extraction module.
    
    Add re-export `pub use extraction::go_buildinfo;` to make the extractor publicly available.
    
    Update the basic usage example (lines 19-32) to demonstrate calling `extraction::extract_all(&container_info, &data)` after parsing the container.
    
    ### src/main.rs(MODIFY)
    
    References: 
    
    - src/extraction/mod.rs(MODIFY)
    - src/types.rs(MODIFY)
    - src/lib.rs(MODIFY)
    
    Enhance the CLI to support Go buildinfo extraction.
    
    Add clap derives or matches for flags: `--go` (enable Go features), `--only go-buildinfo` (filter to only Go strings).
    
    In main, after parsing container: call `extraction::extract_all(&container_info, &data)` to get `Vec<FoundString>`, then filter based on flags (e.g., if `--only go-buildinfo`, keep only those with source GoBuildInfo).
    
    Implement simple output: for each string, print offset, score, tags, source, text (formatted by length).
    
    Add error handling for unsupported formats.
    
    ### Cargo.toml(MODIFY)
    
    No new dependencies required; goblin already handles binary parsing. Ensure `goblin = "0.6"` or latest compatible version supports all needed ELF/PE/Mach-O features. Add dev-dependency `insta` if not present for snapshot testing.
    
    ### tests/fixtures/test_go_buildinfo_elf(NEW)
    
    Add a test fixture: compile a simple Go program (e.g., package main; import "fmt"; func main() { fmt.Println("Hello Go!") }) with `go build -o test_go_buildinfo_elf -ldflags='-buildvcs=false'` to include buildinfo section without VCS. Ensure it's ELF amd64 Linux.
    
    ### tests/fixtures/README.md(MODIFY)
    
    References: 
    
    - tests/fixtures/test_go_buildinfo_elf(NEW)
    
    Update the fixtures list to include the new Go binary fixture and build instructions: `go mod init test; go build -o test_go_buildinfo_elf main.go`. Note platforms and Go version requirements (1.18+).
    
    ### tests/integration_go_buildinfo.rs(NEW)
    
    References: 
    
    - tests/integration_elf.rs
    - src/extraction/go_buildinfo.rs(NEW)
    - tests/fixtures/test_go_buildinfo_elf(NEW)
    
    Create integration tests mirroring `integration_elf.rs`.
    
    Test detection: load fixture, extract, assert non-empty with `source == GoBuildInfo`.
    
    Test fields: assert presence of Go version (matches "go1.*"), module path, settings like GOOS/GOARCH.
    
    Test scoring: all Go strings have score >=95.
    
    Test fallback: on non-Go binary, returns empty.
    
    Test malformed: modify fixture header, ensure graceful empty return.
    
    Snapshot test: capture formatted output of extracted strings.
    
    ### docs/src/string-extraction.md(MODIFY)
    
    References: 
    
    - src/extraction/go_buildinfo.rs(NEW)
    
    Add a new section 'Go Buildinfo Extraction' after 'Import/Export Names'.
    
    Describe the format: magic bytes, header, string extraction (pointer/inline), module info parsing.
    
    List extracted fields: GoVersion (tag: Version), Path (Module), Settings (BuildSetting), VCS (VcsInfo).
    
    Explain location strategy: section name search + magic scan fallback.
    
    Provide usage example: `stringy --only go-buildinfo binary`.
    
    Note high confidence (95+) due to structured nature.
    
    ### docs/src/cli.md(MODIFY)
    
    References: 
    
    - src/main.rs(MODIFY)
    
    In 'Usage' section, add examples for Go extraction: `stringy go_binary --go` and `stringy go_binary --only go-buildinfo`.
    
    In 'Options' table, add `--go` (enable Go extractors) and extend `--only` to support `go-buildinfo`.
    
    In 'Tags' section, document new tags: `module`, `build-setting`, `vcs-info`, `go-buildinfo`.

    ---

    Developer Humor

    In the world of binaries, where strings hide deep,\n> Go buildinfo whispers secrets we need to keep.\n> With magic bytes and headers so fine,\n> We extract the truth, line by line!\n> Score it high at ninety-five,\n> Go binaries now come alive! 🐹🔍

    ---

    Execution Information

    Branch: main
    Commit: 37cfc7c
12. unclesp1d3r

    added

    status:backlogTask in backlogTask in backlog

    on Jul 4, 2026