# Research: SDK Publish-Ready Documentation

**Date**: 2026-01-17
**Feature**: 001-sdk-publish-ready

## Executive Summary

The LastID Rust SDK is in excellent shape for public release. Documentation coverage exceeds 99%, examples are comprehensive, and the codebase follows best practices. Only minor fixes are needed before publishing.

## Findings

### 1. Documentation Coverage Audit

**Decision**: Documentation is publish-ready with minor enhancements.

**Rationale**:
- 1,555 rustdoc item comments (`///`)
- 223 module-level comments (`//!`)
- All 8 examples have proper headers and run instructions
- Zero TODO/FIXME/placeholder comments in production code
- `cargo doc --no-deps` completes with zero warnings

**Alternatives Considered**:
- Full documentation rewrite: Rejected - existing docs are high quality
- Automated doc generation: Rejected - manual docs provide better context

### 2. Test Suite Status

**Decision**: Fix test compilation before release.

**Rationale**:
The `IdpClient` trait was updated to include `bearer_token` parameter but `tests/contract_idp_client.rs` still uses the old 2-argument signature. This is a simple fix.

**Impact**:
- 5 test functions affected in `contract_idp_client.rs`
- Fix: Add `"test_bearer_token"` as second argument to all `request_credential` calls

### 3. Clippy Compliance

**Decision**: Address all clippy warnings for pedantic compliance.

**Rationale**:
Constitution requires zero clippy warnings. Current state: ~20 warnings across multiple files.

**Categories**:
1. **Style** (low effort): unnested or-patterns, format string variables, redundant continue
2. **Performance** (low effort): Clone::clone() → .clone()
3. **Precision** (requires thought): u64↔f64 casts in timing code
4. **Documentation** (low effort): Add backticks around code items

### 4. External Documentation

**Decision**: Create CHANGELOG.md and CONTRIBUTING.md.

**Rationale**:
- Spec FR-016 requires CHANGELOG.md for version history
- Spec FR-017 requires CONTRIBUTING.md for guidelines
- Standard practice for open source Rust crates

**Template Sources**:
- CHANGELOG: Keep a Changelog format (https://keepachangelog.com)
- CONTRIBUTING: Rust standard template with SDK-specific additions

### 5. Example Warnings

**Decision**: Fix example warnings for clean build output.

**Files**:
- `employment_verification.rs`: 1 warning (unused variable or similar)
- `age_verification.rs`: 2 warnings
- `trust_credential.rs`: 1 warning

**Rationale**: Clean `cargo build --examples` output improves DX.

## Unknowns Resolved

| Unknown | Resolution |
|---------|------------|
| Documentation gaps | None found - 99%+ coverage |
| API stability | Stable - no planned breaking changes |
| Test coverage | Cannot measure until tests compile |
| Platform support | All targets verified in Cargo.toml |

## Risk Assessment

| Risk | Probability | Impact | Mitigation |
|------|-------------|--------|------------|
| Test fixes break functionality | Low | Medium | Run full test suite after fix |
| Clippy fixes change behavior | Low | Low | Review each change carefully |
| Documentation gaps missed | Very Low | Low | Manual review + docs.rs preview |

## Next Steps

1. Fix test compilation in `contract_idp_client.rs`
2. Address clippy warnings systematically
3. Create CHANGELOG.md with v0.1.0 entry
4. Create CONTRIBUTING.md with guidelines
5. Fix example warnings
6. Run full CI verification (tests, coverage, clippy, docs)
