fea/references/phases/phase4-planning.md

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# Phase 4
## Step 1 — Deep codebase analysis
Use the Agent tool with `model: "haiku"` and `subagent_type: "Explore"` with thoroughness "very thorough" to:
- Map every file that will be created or modified
- Identify dependency order between changes
- Find existing test patterns
- Note migration requirements
## Step 2 — Create plan
Use the Agent tool with `model: "opus"` and `subagent_type: "general-purpose"` to design the implementation plan based on:
- The feature description from the `<!-- status:ready -->` comment
- Full Q&A history from all session comments
- Codebase exploration results
- The project's existing patterns (DDD layers, aggregate repos, hand-written SQL, Watermill messaging, etc.)
The plan must produce content for three wiki page types (see `templates/` for format):
### Feature page content
- Problem summary
- Design decisions
- Task dependency graph (ASCII)
- Tasks table with IDs and titles
### Sub-task pages content (one per task: T01, T02, ...)
- Description of what the task accomplishes
- Files created/modified
- Dependencies and parallel tasks
- Detailed changes with code sketches
## Step 3 — Clone/pull wiki repo
Follow `references/wiki-git.md` setup instructions:
```bash
set -a; source .claude/.env; set +a
WIKI_URL="https://${GITEA_USER}:${GITEA_ACCESS_TOKEN}@${GITEA_HOST#https://}/${owner}/${repo}.wiki.git"
if [ -d .wiki/.git ]; then
git -C .wiki pull --rebase
else
git clone "$WIKI_URL" .wiki 2>/dev/null || {
mkdir -p .wiki && git -C .wiki init && git -C .wiki remote add origin "$WIKI_URL"
}
fi
```
## Step 4 — Write wiki pages
Wiki page naming:
- **Feature page**: `feature-<issue_number>-<slug>.md` where `<slug>` is kebab-case issue title (max 40 chars)
- **Sub-task pages**: `feature-<issue_number>-<slug>-t<NN>.md` (e.g. `feature-12-user-auth-t01.md`)
Write all pages as markdown files in `.wiki/` using the Write tool:
- Feature page from `templates/feature.md`
- Each sub-task page from `templates/subtask.md`
## Step 5 — Update Home wiki page
If `.wiki/Home.md` does not exist, create it using `templates/readme.md` format with the current feature as the first row.
If it exists, read it and append a new row for this feature to the table.
Feature table row format:
```
| <issue_number> | [<title>](<issue_url>) | Planning | [Wiki](<feature_wiki_url>) |
```
## Step 6 — Publish wiki
Commit and push all pages atomically:
```bash
git -C .wiki add -A
git -C .wiki commit -m "feat(wiki): publish plan for issue #${issue_number}"
git -C .wiki push -u origin main
```
## Step 7 — Post plan link as comment
Construct wiki URLs: `https://$GITEA_HOST/$owner/$repo/wiki/<page-name>` (page-name = filename without `.md`).
Post a comment on the issue via `mcp__gitea__create_issue_comment` (or `tea` fallback):
```markdown
<!-- mpns-feature-bot -->
# Implementation Plan
Published to wiki: [<feature-page-name>](<feature-wiki-url>)
## Tasks
- [ ] T01: [<task title>](<t01-wiki-url>)
- [ ] T02: [<task title>](<t02-wiki-url>)
...
```
Tell the user: "Implementation plan published to wiki. Link posted on the issue."