Files
holocron/docs/issues/0021-implement-skills.md
Defame1297 d98d0dae18 chore: migrate legacy pre-commit hook to .pre-commit-config.yaml
Replaces shell script (.git/hooks/pre-commit.legacy) with ecosystem-managed pre-commit framework:
- gitleaks/gitleaks: secret scanning
- jumanjihouse/pre-commit-hooks: shellcheck wrapper
- pre-commit/pre-commit-hooks: JSON/YAML validation, end-of-file-fixer, trailing-whitespace
- local hooks: SKILL.md frontmatter validation

Uses pinned versions for reproducibility across environments. Includes auto-fixes from hook runs (formatting, trailing whitespace, JSON beautification).

Co-Authored-By: Claude Haiku 4.5 <noreply@anthropic.com>
2026-06-27 18:54:37 +00:00

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# 0021 — Implement skills: implement-feature, tdd, refactor, diagnose
**Type:** HITL
**Parent PRD:** `docs/prd/chunk-3-skills-library.md`
## What to build
The 4 implement phase skills. One is new; three are preserved Pocock placeholders upgraded to the authoring standard. All authored via `write-skill` (0018), evals via `write-eval` (0017). `write-docs` has been moved to issue 0018 phase 2.
**Skills, origins, and trigger descriptions:**
| Flat name | Origin | Trigger description |
|---|---|---|
| `implement-feature` | New | Implement a feature, build this, write the code for X |
| `tdd` | Preserved; frontmatter + standard added | TDD, test-driven, red-green-refactor |
| `refactor` | New | Refactor this code, improve structure, clean up |
| `diagnose` | Preserved; frontmatter + standard added | Diagnose this, what's wrong with X, debug this |
**Key constraints per skill:**
- `implement-feature`: must start from a linked issue with an EARS spec (checks `docs/issues/` in the file-based phase, Gitea MCP when configured); flags if none exists; no unrequested abstractions; updates `docs/spec/` as part of implementation if behaviour changes; calls `tdd` as its implementation methodology
- `tdd`: composable and separate from `implement-feature` so TDD can be used outside full feature implementation; red-green-refactor loop
- `refactor`: preserves all existing behaviour; documents what changed and why
- `diagnose`: preserved behavior; add frontmatter, authoring standard sections, and dead-reference cleanup
## Implementation notes
Follow the per-skill workflow defined in `docs/notes/skill-implementation-workflow.md`.
**Known upstream sources to review for this category:**
- `mattpocock/skills` — original `tdd` and `diagnose` placeholders; review at current HEAD; record SHAs in `source:` for any adopted content
- `bmad-method/bmad-method` — BMAD developer role and implementation patterns; relevant for `implement-feature` and `refactor`
For new skills (`implement-feature`, `refactor`, `write-docs`): search for prior art in the above repos before writing from scratch.
## Acceptance criteria
- [ ] All 4 SKILL.md files exist at `.agents/skills/<skill-name>/SKILL.md`; `metadata.category: implement`; authoring standard met (`write-docs` is in issue 0018 phase 2)
- [ ] Dead references removed from Pocock skills (`tdd`, `diagnose`)
- [ ] `implement-feature` checks for linked issue with EARS spec before proceeding; calls `tdd` by name
- [ ] `source:` fields populated for adopted upstream content
- [ ] Each skill has a co-located eval at `.agents/evals/implement/<skill-name>/eval.yaml` via `write-eval`
- [ ] `install.sh` deploys all 4 to `~/.agents/skills/`
- [ ] **HITL:** human runs behavioral test per skill
- [ ] **HITL:** human reviews each SKILL.md and eval before committing
- [ ] Per-skill process followed for all 4 skills: source discovery (sub-agent) → source review with licence/security check (sub-agent) → conflict check against constitution + factory principles (sub-agent) → synthesis grill → co-write iteratively
- [ ] Trigger description for each skill tested against explicit, implicit, and negative queries before body written
- [ ] `when:` frontmatter field present in all SKILL.md files
- [ ] `source:` and `references:` fields correctly populated or absent
- [ ] eval.yaml for each skill contains all 5 required test types
- [ ] Body ≤500 lines for each skill
- [ ] `write-docs` confirmed removed from scope (implemented in issue 0018 phase 2)
- [ ] `docs/spec/overview.md` updated to reflect all 4 skills deployed
## Blocked by
- 0016 (per-skill workflow)
- 0017 (`write-eval`)
- 0018 (`write-skill`)