feat: multi-agent support — gstack works on Codex, Gemini CLI, and Cursor (v0.9.0) (#226) * refactor: host-aware gen-skill-docs + --host codex generation Refactor gen-skill-docs.ts for multi-agent support: - Add Host type, HostPaths interface, HOST_PATHS config - Decompose generatePreamble() into 7 composable sub-functions - Replace all hardcoded .claude/skills/gstack paths with ctx.paths - Replace static findTemplates() list with dynamic filesystem scan - Add --host codex|agents flag (aliases, same output) - Add processTemplate host routing to .agents/skills/gstack-*/ - Add codexSkillName() with double-prefix prevention - Add transformFrontmatter() — keeps only name + description for Codex - Add extractHookSafetyProse() — converts hooks to inline advisory - Add body text path rewriting for remaining hardcoded paths - Exclude /codex skill from Codex generation (self-referential) Claude output is unchanged (verified via --dry-run). SKILL.md is an open standard: .agents/skills/ works on Codex, Gemini CLI, and Cursor. Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com> * feat: generate Codex/Gemini/Cursor skills into .agents/skills/ Generated 21 skill files for the open SKILL.md standard: - Output: .agents/skills/gstack-*/SKILL.md (one per skill) - Frontmatter: name + description only (no allowed-tools/version) - No .claude/skills/ paths in any generated file - /codex skill excluded (Claude wrapper, self-referential on Codex) - Hook skills (careful/freeze/guard) get inline safety prose - Build script generates both hosts: bun run build Supported agents (all read .agents/skills/): - Codex CLI - Gemini CLI - Cursor Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com> * feat: dual-host setup + find-browse for Codex/Gemini/Cursor - setup: add --host codex|claude|auto flag, install to ~/.codex/skills/ when targeting Codex, auto-detect installed agents - find-browse: priority chain .codex > .agents > .claude (both workspace-local and global) - dev-setup/teardown: create .agents/skills/gstack symlinks for dev mode Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com> * test: Codex generation tests + CI + docs for multi-agent support Tests (28 new): - Codex output path routing, frontmatter validation (name+description only) - No .claude/skills/ path leaks in Codex output (regression guard) - /codex skill exclusion, hook→prose conversion, multiline YAML - --host agents alias, dynamic template discovery - Codex skill validation + $B command validation - find-browse priority chain verification - Replace static ALL_SKILLS list with dynamic filesystem scan CI: - Add Codex freshness check to skill-docs workflow Docs: - AGENTS.md: Codex-facing project instructions - README: multi-agent installation section - CONTRIBUTING: dual-host development workflow - CHANGELOG: v0.9.0 multi-agent support entry Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com> * feat: Codex E2E test harness — verify skills work on Codex CLI New test infrastructure: - CodexSessionRunner: spawns codex exec, parses JSONL stream, returns structured results (output, reasoning, toolCalls, tokens) - JSONL parser ported from Python (codex/SKILL.md.tmpl) to TypeScript - Temp HOME skill installation for Codex discovery testing E2E tests (gated behind EVALS=1 + codex + OPENAI_API_KEY): - codex-discover-skill: installs skill, verifies Codex finds it - codex-review-findings: runs gstack-review via Codex, validates output Integrates with existing eval infrastructure: - Diff-based test selection via touchfiles - Eval persistence via EvalCollector - bun run test:codex / test:codex:all convenience scripts Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com> * fix: bump VERSION to 0.9.0 to match CHANGELOG Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com> * fix: Codex sidecar paths + setup installs generated skills Two bugs found by Codex adversarial review: 1. Sidecar path mismatch: generated Codex skills referenced .agents/skills/gstack-review/checklist.md but setup creates sidecars at .agents/skills/gstack/review/. Fixed path rewriter to emit .agents/skills/gstack/review/ (matching setup layout). 2. Setup installed Claude-format source dirs for Codex global install instead of the generated Codex-format skills. Split link_skill_dirs into link_claude_skill_dirs (source dirs for Claude) and link_codex_skill_dirs (generated .agents/skills/ gstack-* dirs for Codex). Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com> * test: comprehensive Codex path rewriting + setup install tests 17 new tests covering: - Sidecar path rewriting: .claude/skills/review → .agents/skills/gstack/review/ (catches the bug where checklist.md was unreachable at gstack-review/) - All 4 path rewrite rules tested individually across all skills - Greptile triage sidecar path correctness - Ship skill sidecar paths for pre-landing review - Claude output regression guard: zero Codex paths in any Claude skill - Setup script validation: separate link functions for Claude vs Codex, link_codex_skill_dirs reads from .agents/skills/, create_agents_sidecar links runtime assets (bin, browse, review, qa) Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com> * fix: regenerate Codex skills after investigate rename merge Remove stale gstack-debug, add gstack-investigate, regenerate all Codex skills to pick up changes merged from main (investigate rename, platform-agnostic templates, review helpers). Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com> * fix: Codex E2E uses ~/.codex/ auth, not OPENAI_API_KEY - Remove OPENAI_API_KEY gate from test prerequisites - Copy real ~/.codex/ auth config into temp HOME so codex can authenticate - Increase review test timeout to 540s (codex does thorough 60+ tool call reviews) - Document in CLAUDE.md that Codex uses its own auth config Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com> --------- Co-authored-by: Claude Opus 4.6 (1M context) <noreply@anthropic.com>