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planet/.codex/skills/docs/SKILL.md
2026-04-28 16:10:17 +08:00

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---
name: docs
description: Analyze current Planet repo changes and create or update technical documentation under docs/technical/zh. Use when the user asks to write docs, update technical docs, summarize implementation changes into documentation, or port the Claude docs-codex workflow into Codex.
---
# Docs
Use this skill when the user asks to create or update Planet technical documentation, especially under `docs/technical/zh/`.
## Goal
Write or update technical docs that explain why a change exists, not only what files changed.
Default target directory:
- `docs/technical/zh/`
## Workflow
1. Gather change context:
```bash
git diff HEAD --stat
git diff HEAD --name-only
git log --oneline -10
ls docs/technical/zh/
```
If the user gives a specific topic, focus on that topic. Otherwise infer the documentation topic from the file list and diff stat. Do **not** read the full repository diff by default; inspect focused diffs only for the files that define the doc topic:
```bash
git diff HEAD -- <path>
rg -n "class |def |function |export |router|@router|interface |type " <path>
```
2. Decide document scope:
- Use one document for one coherent topic.
- Split documents when the changes cross meaningful domains, such as backend performance and ops startup behavior.
- Prefer updating an existing relevant doc over creating a duplicate.
- Name new files as lowercase hyphenated `domain-topic-detail.md`, for example:
- `backend-datasources-api-performance.md`
- `ops-planet-sh-startup.md`
- `earth-bgp-context.md`
3. Write the doc in Chinese:
- Write Chinese prose for `docs/technical/zh/`.
- Keep technical identifiers, API paths, config keys, code symbols, and standard product names in English where appropriate.
- Use `##` and `###` headings; avoid going deeper than three levels.
- Use fenced code blocks with language tags.
- Use tables when comparing options or listing parameters.
4. Required content:
- Background/problem: what was wrong before and why the change was needed.
- Core design decisions and rationale.
- Key code snippets, preferably before/after or focused excerpts.
- Related files and what each file contributes.
5. Verification:
- Read the completed doc and check that the reasoning is clear.
- Verify important referenced paths exist.
- Use `rg --files` or `test -e` for path existence instead of relying on memory.
- Run a quick duplicate-language check when editing bilingual docs:
```bash
python - <<'PY'
from pathlib import Path
same = []
for en in sorted(Path("docs/technical/en").glob("*.md")):
zh = Path("docs/technical/zh") / en.name
if zh.exists() and en.read_text() == zh.read_text():
same.append(en.name)
if same:
raise SystemExit("identical en/zh docs: " + ", ".join(same))
print("no identical en/zh docs")
PY
```
Also check that Chinese docs do not link to the old language-less technical docs path:
```bash
rg -n "/home/ray/dev/linkong/planet/docs/technical/(?!zh|en)" docs/technical/zh --pcre2
```
This command should return no matches.
If checking many links, prefer deterministic extraction:
```bash
rg -n "\]\(([^)]+)\)" docs/technical/zh/<doc>.md
```
## Hard Constraints
- A file under `docs/technical/zh/` must not be an English source file copied as a placeholder.
- Do not leave a Chinese doc with only an English title and English first-screen content.
- When an English counterpart exists in `docs/technical/en/`, never duplicate it byte-for-byte into `docs/technical/zh/`.
- Internal links inside `docs/technical/zh/` should point to `docs/technical/zh/...` for Chinese docs, unless intentionally linking to an English-only file.
- Do not reference PR numbers, issue numbers, or the current conversation.
- Do not write changelog-style lists like "changed A, changed B, changed C" without the constraints and tradeoffs behind those changes.
- Keep code snippets concise and relevant.
## Recommended Output
After editing, summarize:
```md
Updated:
- docs/technical/zh/example.md — what changed
Verified:
- no identical en/zh docs
- no language-less docs/technical links in zh docs
```