From 9ca716308175c6647fd8d023414eb88650aa8e4e Mon Sep 17 00:00:00 2001 From: dev-parkins Date: Mon, 13 Oct 2025 21:45:24 -0700 Subject: [PATCH] docs(v0.0.5): comprehensive rustdoc implementation plan - Created RUSTDOC_IMPLEMENTATION_PLAN.md in docs/planning/v0.0.5/ - Analyzed current documentation coverage (~25% across crates) - Defined 4-phase implementation strategy (2-3 weeks, 62 hours) - Established documentation standards and templates - Included future enhancements (JSON export for AI integration) - References attached RUSTDOC_RESEARCH.md for AI integration guidance Phases: 1. Foundation Setup - Workspace config, CI integration (8h) 2. Compiler Documentation - All compiler crate APIs (27h) 3. Runtime & Godot Docs - Runtime and binding APIs (19h) 4. Validation & CI - Link checking, example testing (8h) Success criteria: 80%+ coverage, all examples compile, CI enforcement --- .../v0.0.5/RUSTDOC_IMPLEMENTATION_PLAN.md | 873 ++++++++++++++++++ 1 file changed, 873 insertions(+) create mode 100644 docs/planning/v0.0.5/RUSTDOC_IMPLEMENTATION_PLAN.md diff --git a/docs/planning/v0.0.5/RUSTDOC_IMPLEMENTATION_PLAN.md b/docs/planning/v0.0.5/RUSTDOC_IMPLEMENTATION_PLAN.md new file mode 100644 index 0000000..bee0753 --- /dev/null +++ b/docs/planning/v0.0.5/RUSTDOC_IMPLEMENTATION_PLAN.md @@ -0,0 +1,873 @@ +# Rustdoc Implementation Plan for FerrisScript + +**Version**: v0.0.5 (or later) +**Created**: October 13, 2025 +**Status**: Planning +**Effort Estimate**: 2-3 weeks (Medium complexity) + +--- + +## 📋 Table of Contents + +- [Executive Summary](#-executive-summary) +- [Problem Statement](#-problem-statement) +- [Goals & Non-Goals](#-goals--non-goals) +- [Current State Analysis](#-current-state-analysis) +- [Proposed Solution](#-proposed-solution) +- [Implementation Phases](#-implementation-phases) +- [Effort Estimation](#-effort-estimation) +- [Success Criteria](#-success-criteria) +- [Future Enhancements](#-future-enhancements) +- [References](#-references) + +--- + +## 🎯 Executive Summary + +**Goal**: Establish comprehensive Rustdoc coverage for all FerrisScript crates to improve: + +1. **Developer Onboarding** - New contributors can understand code structure quickly +2. **API Discovery** - Public APIs are clearly documented with examples +3. **Maintenance** - Future developers understand original design intent +4. **Professionalism** - Generated docs at + +**Approach**: Leverage existing `///` comments (50+ already present), generate JSON output for potential AI integration, and establish CI validation to maintain quality. + +**Timeline**: 2-3 weeks across 4 phases + +--- + +## 🎯 Problem Statement + +### Current State + +FerrisScript has **partial rustdoc coverage**: + +- ✅ Some modules have `///` comments (test_harness, report_generator, scene_builder) +- ❌ No workspace-level documentation landing page +- ❌ No `cargo doc` CI validation +- ❌ No published docs on +- ❌ Inconsistent documentation style across crates +- ❌ Missing examples in public API documentation + +### Pain Points + +1. **Onboarding Friction**: New contributors must read source code to understand APIs + - No high-level overview of compiler pipeline + - No runtime architecture explanation + - No Godot binding usage examples + +2. **Maintenance Burden**: Original design intent not captured + - Why was error recovery implemented this way? + - What's the relationship between AST, TypeChecker, and Runtime? + - How do lifecycle functions integrate with Godot? + +3. **API Discoverability**: Hard to find the right function/struct + - No searchable documentation + - No cross-references between related types + - No examples showing typical usage patterns + +4. **Lost Opportunity**: Rustdoc JSON could power AI coding assistants + - Could generate embeddings for semantic search + - Could auto-complete based on documented APIs + - Could validate usage examples automatically + +--- + +## 🎯 Goals & Non-Goals + +### Goals + +1. **Comprehensive Coverage**: Every public item documented with `///` comments + - Modules, structs, enums, traits, functions + - Private items documented with `//` for maintainers + +2. **Consistent Style**: Follow Rust documentation conventions + - Summary sentence (one line, ends with period) + - Detailed explanation (paragraphs) + - Examples for complex APIs + - Links to related items + +3. **CI Integration**: Automated validation + - `cargo doc --workspace --no-deps` must succeed + - Missing docs treated as warnings (enforced in CI) + - Link checking for `[crate::module::Type]` references + +4. **Published Docs**: Available on + - Crates published to crates.io (when ready) + - Docs auto-generated on publish + - README integrated as crate-level docs + +5. **JSON Export**: Rustdoc JSON for AI integration (future) + - `cargo +nightly doc -- -Z unstable-options --output-format json` + - Enables semantic search and embeddings + - Powers intelligent code completion + +### Non-Goals + +1. ❌ **User-facing tutorials** - Those belong in `docs/` markdown files +2. ❌ **Architecture documentation** - Keep in `docs/ARCHITECTURE.md` +3. ❌ **Full AI integration** - Just enable it, don't build it yet +4. ❌ **Mdbook generation** - Use `cargo doc`, not custom tooling +5. ❌ **External dependency docs** - `--no-deps` flag excludes them + +--- + +## 📊 Current State Analysis + +### Documentation Coverage Audit + +| Crate | Public Items | Documented | Coverage | Quality | +| ------------------------- | ------------ | ---------- | -------- | ------- | +| `ferrisscript_compiler` | ~80 | ~15 | ~19% | 🟡 Fair | +| `ferrisscript_runtime` | ~50 | ~10 | ~20% | 🟡 Fair | +| `ferrisscript_godot_bind` | ~30 | ~5 | ~17% | 🟠 Poor | +| `ferrisscript_test_harness` | ~40 | ~25 | ~63% | 🟢 Good | + +**Overall**: ~25% coverage (50 documented out of ~200 public items) + +### Existing Documentation Patterns + +**Good Examples** (to replicate): + +```rust +/// Results grouped by test category. +/// +/// Organizes test results into unit tests, integration tests, and error demos. +pub struct CategoryResults { + pub unit_tests: Vec, + pub integration_tests: Vec, + pub error_demos: Vec, +} +``` + +**Missing Documentation** (needs attention): + +```rust +// ❌ No docs +pub struct Lexer { + input: String, + position: usize, +} + +// ✅ Should be: +/// Tokenizes FerrisScript source code into a stream of tokens. +/// +/// The lexer performs lexical analysis, converting raw text into +/// structured tokens for the parser. It handles: +/// - Keywords (`fn`, `let`, `struct`, etc.) +/// - Operators (`+`, `-`, `==`, etc.) +/// - Literals (numbers, strings, booleans) +/// - Comments (ignored) +/// +/// # Example +/// ``` +/// use ferrisscript_compiler::Lexer; +/// +/// let source = "let x: i32 = 42;"; +/// let mut lexer = Lexer::new(source); +/// let tokens = lexer.tokenize()?; +/// ``` +pub struct Lexer { + input: String, + position: usize, +} +``` + +### Workspace Configuration + +**Current `Cargo.toml` metadata**: + +```toml +[workspace.package] +version = "0.0.4" +edition = "2021" +authors = ["FerrisScript Contributors"] +license = "MIT" +``` + +**Missing metadata** (needed for docs.rs): + +```toml +[workspace.package] +version = "0.0.4" +edition = "2021" +authors = ["FerrisScript Contributors"] +license = "MIT" +homepage = "https://github.com/dev-parkins/FerrisScript" +repository = "https://github.com/dev-parkins/FerrisScript" +documentation = "https://docs.rs/ferrisscript-compiler" +readme = "README.md" +keywords = ["gamedev", "godot", "scripting", "compiler", "rust"] +categories = ["game-development", "parser-implementations"] +``` + +--- + +## 🛠 Proposed Solution + +### Architecture Overview + +```mermaid +graph TD + A[Source Code with ///] -->|cargo doc| B[Rustdoc HTML] + A -->|cargo +nightly doc --json| C[Rustdoc JSON] + B --> D[docs.rs Publication] + C --> E[AI Integration Future] + + B --> F[CI Validation] + F -->|Check links| B + F -->|Enforce coverage| A +``` + +### Documentation Structure + +**Crate-Level Documentation** (`lib.rs`): + +```rust +//! # FerrisScript Compiler +//! +//! The FerrisScript compiler translates `.ferris` source files into +//! executable bytecode for the Godot game engine. +//! +//! ## Architecture +//! +//! The compilation pipeline consists of four stages: +//! +//! 1. **Lexical Analysis** ([`Lexer`]): Tokenizes source code +//! 2. **Parsing** ([`Parser`]): Builds an Abstract Syntax Tree (AST) +//! 3. **Type Checking** ([`TypeChecker`]): Validates types and semantics +//! 4. **Code Generation** (future): Emits bytecode +//! +//! ## Example +//! +//! ```no_run +//! use ferrisscript_compiler::{Lexer, Parser, TypeChecker}; +//! +//! let source = std::fs::read_to_string("script.ferris")?; +//! let tokens = Lexer::new(&source).tokenize()?; +//! let ast = Parser::new(tokens).parse()?; +//! let checked = TypeChecker::new().check(ast)?; +//! # Ok::<(), Box>(()) +//! ``` +//! +//! ## See Also +//! +//! - [`ferrisscript_runtime`]: Runtime execution engine +//! - [`ferrisscript_godot_bind`]: Godot GDExtension bindings +``` + +**Module-Level Documentation**: + +```rust +//! Error handling and reporting. +//! +//! This module provides structured error types for all compilation stages: +//! - Lexical errors (unexpected characters, unterminated strings) +//! - Syntax errors (missing braces, invalid expressions) +//! - Type errors (type mismatches, undefined variables) +//! - Semantic errors (duplicate declarations, invalid operations) +//! +//! All errors implement [`std::error::Error`] and include: +//! - Human-readable error messages +//! - Source location information (file, line, column) +//! - Suggestions for fixing the error +``` + +**Item-Level Documentation**: + +```rust +/// Parses FerrisScript source code into an Abstract Syntax Tree (AST). +/// +/// The parser consumes a token stream from the [`Lexer`] and builds +/// a structured representation of the program. It uses recursive descent +/// parsing with operator precedence for expressions. +/// +/// # Error Recovery +/// +/// The parser implements panic-mode error recovery, allowing it to +/// continue parsing after encountering errors. This enables reporting +/// multiple errors in a single compilation pass. +/// +/// # Example +/// +/// ``` +/// use ferrisscript_compiler::{Lexer, Parser}; +/// +/// let source = "fn add(a: i32, b: i32) -> i32 { a + b }"; +/// let tokens = Lexer::new(source).tokenize()?; +/// let mut parser = Parser::new(tokens); +/// let program = parser.parse()?; +/// # Ok::<(), Box>(()) +/// ``` +/// +/// # Panics +/// +/// Panics if internal parser state becomes inconsistent (indicates a bug). +pub struct Parser { + tokens: Vec, + current: usize, +} +``` + +### Documentation Standards + +**Every public item must include**: + +1. **Summary** (first line): One sentence, ends with period +2. **Description** (paragraphs): What it does, how it works +3. **Examples** (for complex APIs): Working code snippets +4. **Errors** (if applicable): When does it return `Err`? +5. **Panics** (if applicable): When does it panic? +6. **Safety** (for `unsafe`): Invariants that must be upheld + +**Style Guide**: + +- Use present tense ("Returns the value" not "Will return") +- Link to related items with `[Type]` or `[module::Type]` +- Use code fences for examples: ` ```rust ` or ` ```no_run ` +- Add `# Ok::<(), Error>(())` to make examples compile +- Keep lines under 100 characters for readability + +--- + +## 📋 Implementation Phases + +### Phase 1: Foundation Setup (Week 1, Days 1-2) + +**Goal**: Configure workspace for documentation generation + +#### Tasks + +1. **Update `Cargo.toml` metadata** (1 hour) + - Add homepage, repository, documentation URLs + - Add keywords and categories for crates.io + - Add README.md path + +2. **Add crate-level docs** (`lib.rs` files) (3 hours) + - `crates/compiler/src/lib.rs` + - `crates/runtime/src/lib.rs` + - `crates/godot_bind/src/lib.rs` + - `crates/test_harness/src/lib.rs` + - Include architecture overview, examples, links + +3. **Set up doc validation** (2 hours) + - Add `#![warn(missing_docs)]` to each crate + - Create `.cargo/config.toml` with doc settings + - Test `cargo doc --workspace --no-deps` + +4. **CI Integration** (2 hours) + - Add doc generation step to `.github/workflows/ci.yml` + - Fail CI if docs have warnings + - Fail CI if `cargo doc` fails + +#### Deliverables + +- ✅ All 4 crates have crate-level documentation +- ✅ `cargo doc --workspace --no-deps` succeeds +- ✅ CI enforces documentation requirements +- ✅ Workspace metadata complete + +#### Acceptance Criteria + +- [ ] `cargo doc --workspace --no-deps` generates HTML without warnings +- [ ] CI job "Documentation Check" passes +- [ ] Opening `target/doc/ferrisscript_compiler/index.html` shows crate overview + +--- + +### Phase 2: Compiler Crate Documentation (Week 1, Days 3-5) + +**Goal**: Document all public APIs in `ferrisscript_compiler` + +#### Modules to Document + +1. **`lexer`** (6 hours) + - `Lexer` struct: Main tokenizer + - `Token` enum: Token types + - `TokenKind` enum: Token classification + - `tokenize()` function: High-level API + - Examples: Tokenizing a simple script + +2. **`parser`** (6 hours) + - `Parser` struct: Main parser + - `parse()` method: Entry point + - `parse_*()` methods: Production rules + - Error recovery: Panic mode explanation + - Examples: Parsing expressions, statements + +3. **`ast`** (4 hours) + - `Program`: Top-level AST node + - `Statement`: Statement variants + - `Expression`: Expression variants + - `Type`: Type annotations + - Visitor pattern explanation + +4. **`type_checker`** (6 hours) + - `TypeChecker` struct: Main type checker + - `check()` method: Entry point + - `infer_type()`: Type inference + - `coerce_types()`: Type coercion rules + - Examples: Type checking a function + +5. **`error_code`** (3 hours) + - `ErrorCode` enum: All error codes + - `ErrorCategory`: Error classification + - `get_docs_url()`: Link to error documentation + - Examples: Creating and displaying errors + +6. **`error_context`** (2 hours) + - `ErrorContext` struct: Rich error formatting + - `format_error()`: Human-readable output + - Source location tracking + +#### Documentation Templates + +**Struct Template**: + +```rust +/// [One-line description ending with period.] +/// +/// [Detailed explanation of what this struct represents and when to use it. +/// Include design rationale if non-obvious.] +/// +/// # Example +/// +/// ``` +/// [Working code example showing typical usage] +/// ``` +/// +/// # See Also +/// +/// - [`RelatedType`]: [Why it's related] +pub struct MyStruct { + /// [Field description] + pub field: Type, +} +``` + +**Method Template**: + +```rust +/// [One-line description ending with period.] +/// +/// [Detailed explanation of what this method does, how it works, +/// and any important behavior.] +/// +/// # Parameters +/// +/// - `param1`: [What this parameter means] +/// - `param2`: [What this parameter means] +/// +/// # Returns +/// +/// [What the return value represents] +/// +/// # Errors +/// +/// Returns `Err` if: +/// - [Condition 1] +/// - [Condition 2] +/// +/// # Example +/// +/// ``` +/// [Working code example] +/// ``` +pub fn my_method(&self, param1: Type1, param2: Type2) -> Result { + // ... +} +``` + +#### Deliverables + +- ✅ All public items in `ferrisscript_compiler` documented +- ✅ At least 80% documentation coverage +- ✅ All examples compile and run +- ✅ Cross-references between related types + +#### Acceptance Criteria + +- [ ] `cargo doc -p ferrisscript_compiler` generates complete docs +- [ ] No missing docs warnings +- [ ] All code examples in docs compile: `cargo test --doc -p ferrisscript_compiler` +- [ ] Manual review: docs are clear and helpful + +--- + +### Phase 3: Runtime & Godot Bind Documentation (Week 2, Days 1-3) + +**Goal**: Document runtime execution and Godot integration + +#### `ferrisscript_runtime` Modules + +1. **`runtime`** (5 hours) + - `Runtime` struct: Execution engine + - `execute()`: Run a program + - `Environment`: Variable storage + - `Value` enum: Runtime values + - Examples: Executing a simple script + +2. **`builtins`** (3 hours) + - Built-in function registration + - `print()`, `assert()` functions + - Godot API wrappers + - Examples: Calling built-in functions + +3. **`lifecycle`** (2 hours) + - `_ready()`, `_process()`, `_input()` hooks + - Godot lifecycle integration + - Examples: Implementing lifecycle functions + +#### `ferrisscript_godot_bind` Modules + +1. **`gdextension`** (4 hours) + - `GDExtension` trait: Godot interface + - FFI bindings: Unsafe wrappers + - Type mapping: Rust ↔ Godot + - Examples: Exposing a Rust function to Godot + +2. **`property_metadata`** (3 hours) + - `@export` annotation handling + - Inspector integration + - Property hints (range, enum, file) + - Examples: Exporting properties + +3. **`signals`** (2 hours) + - Signal declaration and emission + - Godot signal system integration + - Examples: Defining and emitting signals + +#### Deliverables + +- ✅ `ferrisscript_runtime` fully documented +- ✅ `ferrisscript_godot_bind` fully documented +- ✅ Examples compile and demonstrate typical usage +- ✅ Godot integration patterns explained + +#### Acceptance Criteria + +- [ ] `cargo doc -p ferrisscript_runtime` generates complete docs +- [ ] `cargo doc -p ferrisscript_godot_bind` generates complete docs +- [ ] No missing docs warnings in either crate +- [ ] Examples demonstrate real-world usage patterns + +--- + +### Phase 4: Validation & CI Integration (Week 2, Days 4-5) + +**Goal**: Ensure documentation quality and maintainability + +#### Tasks + +1. **Link Validation** (2 hours) + - Verify all `[crate::module::Type]` links resolve + - Check for broken cross-references + - Fix any dead links + +2. **Example Testing** (2 hours) + - Run `cargo test --doc --workspace` + - Fix failing examples + - Add `no_run` attribute where appropriate + +3. **Coverage Report** (1 hour) + - Generate documentation coverage statistics + - Identify remaining undocumented items + - Document or mark as intentionally private + +4. **CI Enhancement** (2 hours) + - Add `cargo doc` step to CI + - Add link checking + - Add coverage threshold (80%+) + +5. **Publishing Preparation** (1 hour) + - Verify crates.io metadata + - Test `cargo publish --dry-run` + - Document publishing process + +#### Deliverables + +- ✅ All links in documentation verified +- ✅ All examples tested and passing +- ✅ CI enforces documentation standards +- ✅ Ready for crates.io publication + +#### Acceptance Criteria + +- [ ] `cargo test --doc --workspace` passes +- [ ] CI "Documentation Check" job passes +- [ ] Documentation coverage ≥ 80% +- [ ] `cargo publish --dry-run` succeeds for all crates + +--- + +## ⏱ Effort Estimation + +### Time Breakdown + +| Phase | Tasks | Estimated Time | Complexity | +| ------ | ----------------------- | -------------- | ---------- | +| Phase 1 | Foundation Setup | 8 hours | 🟢 Easy | +| Phase 2 | Compiler Documentation | 27 hours | 🟡 Medium | +| Phase 3 | Runtime & Godot Docs | 19 hours | 🟡 Medium | +| Phase 4 | Validation & CI | 8 hours | 🟢 Easy | +| **Total** | **All Phases** | **62 hours** | **🟡 Medium** | + +**Calendar Time**: 2-3 weeks (assuming 20-30 hours/week dedicated time) + +### Complexity Assessment + +**Easy Components** (🟢): + +- Crate metadata configuration +- CI integration for doc generation +- Link validation tooling + +**Medium Components** (🟡): + +- Writing clear, helpful documentation +- Creating working code examples +- Cross-referencing related items +- Maintaining consistency across crates + +**Hard Components** (None in this plan): + +- N/A - Rustdoc is a well-established tool with good tooling + +### Risk Factors + +| Risk | Probability | Impact | Mitigation | +| ---------------------------- | ----------- | ------ | --------------------------------------- | +| Examples don't compile | Medium | Medium | Test with `cargo test --doc` early | +| Inconsistent doc style | Medium | Low | Use templates, review before merging | +| Links break during refactor | Low | Medium | CI link checking catches immediately | +| CI becomes too slow | Low | Low | Doc generation is fast (~5-10 seconds) | + +--- + +## ✅ Success Criteria + +### Quantitative Metrics + +- **Documentation Coverage**: ≥ 80% of public items documented +- **Example Pass Rate**: 100% of doc examples compile and run +- **Link Validity**: 100% of cross-references resolve correctly +- **CI Pass Rate**: `cargo doc` succeeds on every PR + +### Qualitative Metrics + +- **Onboarding Time**: New contributors can understand compiler pipeline from docs alone +- **API Discovery**: Developers can find the right function/struct via search +- **Clarity**: Docs answer "what", "why", and "how" for each item +- **Completeness**: Every public item has sufficient context to use it correctly + +### Acceptance Checklist + +- [ ] All crates have crate-level documentation +- [ ] All public items have item-level documentation +- [ ] All complex APIs have working examples +- [ ] `cargo doc --workspace --no-deps` succeeds without warnings +- [ ] `cargo test --doc --workspace` passes +- [ ] CI enforces documentation standards +- [ ] Documentation coverage ≥ 80% +- [ ] Manual review: docs are clear, helpful, and consistent + +--- + +## 🚀 Future Enhancements + +### Phase 5: Rustdoc JSON Export (Post-v0.0.5) + +**Goal**: Enable AI-assisted development via Rustdoc JSON + +#### Implementation + +```bash +# Generate JSON output (requires nightly) +cargo +nightly doc --workspace --no-deps -- \ + -Z unstable-options --output-format json + +# Output: target/doc/ferrisscript_compiler.json +``` + +#### Use Cases + +1. **Semantic Search**: Embed documentation for similarity search +2. **Auto-Complete**: Suggest APIs based on natural language queries +3. **Code Generation**: Generate skeleton code from API signatures +4. **Documentation Validation**: Check for outdated examples + +#### JSON Processing Pipeline + +```mermaid +graph LR + A[Rustdoc JSON] --> B[Parser] + B --> C[Normalize Schema] + C --> D[Generate Embeddings] + D --> E[Vector Database] + E --> F[AI Agent] +``` + +**Parser Example** (from research doc): + +```rust +use serde_json::Value; +use std::fs; + +fn extract_docs(json_path: &str) -> Result, Error> { + let data = fs::read_to_string(json_path)?; + let json: Value = serde_json::from_str(&data)?; + + let mut items = Vec::new(); + if let Some(index) = json.get("index") { + for (id, item) in index.as_object().unwrap() { + let name = item["name"].as_str().unwrap(); + let kind = item["kind"].as_str().unwrap(); + let docs = item.pointer("/inner/docs") + .and_then(|v| v.as_str()) + .unwrap_or(""); + + items.push(DocItem { name, kind, docs }); + } + } + Ok(items) +} +``` + +**Embedding Schema**: + +| Field | Type | Description | +| ------------ | ------ | ------------------------------ | +| `symbol` | String | Function/struct/enum name | +| `kind` | String | `function`, `struct`, `enum` | +| `signature` | String | Type signature or parameters | +| `doc_text` | String | Documentation content | +| `embedding` | Vector | OpenAI embedding (1536-dim) | + +**Integration Points**: + +- LSP server can query embeddings for hover documentation +- Code completion can suggest APIs based on semantic similarity +- Documentation generator can validate examples against signatures + +**Effort**: 2-3 weeks (separate initiative, post-Rustdoc implementation) + +--- + +### Phase 6: Continuous Documentation (Ongoing) + +**Goal**: Maintain high documentation quality over time + +#### Automated Checks + +1. **Pre-Commit Hook**: Warn about undocumented items +2. **CI Enforcement**: Fail PRs with documentation warnings +3. **Coverage Tracking**: Report coverage delta in PR comments +4. **Link Checking**: Validate cross-references on every build + +#### Documentation Culture + +1. **PR Template**: Remind contributors to update docs +2. **Review Checklist**: Verify docs before approving PRs +3. **Documentation Day**: Monthly review and improvement +4. **Contributor Guide**: Add "Writing Good Docs" section + +--- + +## 📚 References + +### Rustdoc Resources + +- [The Rustdoc Book](https://doc.rust-lang.org/rustdoc/) +- [Rustdoc JSON Format](https://doc.rust-lang.org/rustdoc/json.html) +- [Writing Documentation](https://doc.rust-lang.org/book/ch14-02-publishing-to-crates-io.html#making-useful-documentation-comments) + +### FerrisScript Documentation + +- [ARCHITECTURE.md](../../ARCHITECTURE.md) - System architecture overview +- [DEVELOPMENT.md](../../DEVELOPMENT.md) - Development workflow +- [CONTRIBUTING.md](../../CONTRIBUTING.md) - Contribution guidelines + +### Research Documents + +- [RUSTDOC_RESEARCH.md](../../../FerrisScripts-Docs/research/RUSTDOC_RESEARCH.md) - AI integration research +- [RUSTDOC_VS_MARKDOWN.md](../../../FerrisScripts-Docs/research/RUSTDOC_VS_MARKDOWN.md) - Format comparison + +### Tools & Crates + +- [`cargo-readme`](https://crates.io/crates/cargo-readme) - Generate README from docs +- [`serde_json`](https://docs.rs/serde_json) - Parse Rustdoc JSON +- [LangChain Embeddings](https://js.langchain.com/docs/modules/embeddings) - Vector embeddings +- [Qdrant](https://qdrant.tech) - Vector database + +--- + +## 📝 Implementation Notes + +### Documentation Best Practices + +1. **Write docs first**: Helps clarify API design +2. **Use examples liberally**: Show typical usage patterns +3. **Link related items**: Help users discover related APIs +4. **Explain "why"**: Don't just describe "what" +5. **Test examples**: Ensure they compile and run + +### Common Pitfalls to Avoid + +❌ **Don't**: + +- Copy documentation from code comments (be more descriptive) +- Write documentation that just repeats the function name +- Use overly technical jargon without explanation +- Forget to update docs when code changes +- Leave examples that don't compile + +✅ **Do**: + +- Explain the purpose and use case +- Provide context about when to use this API +- Include examples for non-trivial functionality +- Link to related types and functions +- Test documentation with `cargo test --doc` + +--- + +## ✅ Completion Checklist + +### Phase 1: Foundation + +- [ ] Workspace `Cargo.toml` has complete metadata +- [ ] All 4 crates have crate-level docs in `lib.rs` +- [ ] `#![warn(missing_docs)]` added to all crates +- [ ] CI enforces documentation requirements + +### Phase 2: Compiler + +- [ ] `lexer` module fully documented +- [ ] `parser` module fully documented +- [ ] `ast` module fully documented +- [ ] `type_checker` module fully documented +- [ ] `error_code` module fully documented +- [ ] `error_context` module fully documented + +### Phase 3: Runtime & Godot + +- [ ] `runtime` module fully documented +- [ ] `builtins` module fully documented +- [ ] `lifecycle` module fully documented +- [ ] `gdextension` module fully documented +- [ ] `property_metadata` module fully documented +- [ ] `signals` module fully documented + +### Phase 4: Validation + +- [ ] All doc links verified +- [ ] All doc examples pass tests +- [ ] Documentation coverage ≥ 80% +- [ ] CI passes with doc checks +- [ ] Ready for crates.io publication + +--- + +**Status**: Ready for implementation +**Next Steps**: Assign to v0.0.5 milestone and begin Phase 1