# 0016 — Second grill: skill implementation workflow

**Type:** HITL  
**Parent PRD:** `docs/prd/chunk-3-skills-library.md`

## What to build

Run a dedicated grill session on the general skill implementation workflow before any skill is written. The PRD identifies this as the first issue after the AGENTS.md prerequisite — the grill produces the working conventions applied to all subsequent skill issues (0017–0028).

The grill covers:
- Per-skill process steps: trigger-first, eval-first, upstream review, source: field population
- How the `factory/write-eval`-first bootstrap works in practice (hand-written eval for write-eval itself; write-eval used for all subsequent skills)
- Working conventions for refactors (existing Pocock skills) vs new skills
- How to handle a skill that combines patterns from multiple upstream sources
- The upstream review process at chunk start: what to check, what to record, how to decide whether to pull changes in
- Any open questions from the PRD flagged as "refine during implementation" (PRD/issue template scope, bidirectional reference convention in skill frontmatter)

Output is documented in `docs/notes/skill-implementation-workflow.md`, used to update `docs/prd/chunk-3-skills-library.md` with any decisions made, and used to refine issues 0017–0028 with specific acceptance criteria.

HITL: requires human participation in the grill session.

## Acceptance criteria

- [x] Grill session completed covering all topics above
- [x] `docs/notes/skill-implementation-workflow.md` written with the agreed working conventions
- [x] `docs/prd/chunk-3-skills-library.md` updated with any decisions that change or extend the Implementation Decisions section
- [x] Issues 0017–0028 updated with specific acceptance criteria derived from the grill output
- [x] **HITL:** human participates in grill, reviews conventions, and approves before implementation of any skill begins

## Handoff

**Status:** complete  
**Files produced:**
- `docs/notes/skill-implementation-workflow.md`

**Key decisions:**
- Step 6 (session handoff) added post-grill: each skill session closes by appending a `## Handoff` section to the skill's issue file. Cross-cutting observations go to `LESSONS.md` immediately, not batched to chunk end.
- Handoff artifact is the issue file, not a separate `docs/notes/` file — avoids proliferating per-skill note files.

**Open threads:**
- `when:` full bidirectional reference convention — deferred to Chunk 4
- PRD/issue template scope — refined during 0019/0020 implementation
- Merging `zoom-out` into architect role — revisit at Chunk 5 grill

**Next session start:**
- Load: `CONTEXT.md`, `docs/notes/skill-implementation-workflow.md`, issue 0017 or 0018
- First action: Step 1 (source discovery) for `write-eval`

## Blocked by

- 0015 (AGENTS.md refactor must be complete so grill references stable file structure)