# wiki sync

_bring the skill and the recorded release up to date_

**Intent.** wiki sync exists so that a project takes up a release of the tool in one step: the skill its agents read, and the release its pages are checked against. It should write only those, and only where the project asks.

`wiki sync` copies the skill into the project, and records in `wiki.toml` the release it came
from.[^sync] Why the skill lives in the project is described on [Skill](../../skill/index.md).

## Usage

Either skill option may be given, but not both.[^group]
```sh
wiki sync [-h] [--root ROOT] [--wiki WIKI] [--skill-dir DIR | --no-skill]
wiki sync
```

## Options

| Option | Meaning | Default |
|---|---|---|
| `--skill-dir DIR` | the folder to put the skill in, relative to the project[^group] | `.agents/skills` if it exists, otherwise `.claude/skills`[^home] |
| `--no-skill` | record the release without writing the skill[^noskill] | the skill is written |

## Output

It names each file it wrote, leaving out any already up to date, then the release it recorded.[^output] It
deletes nothing, so a file a newer release no longer ships stays where it is.[^output] In a project with
an `.agents/skills` folder:[^output]
```text
wiki: wrote .agents/skills/writing-wiki-pages/SKILL.md
wiki: wrote .agents/skills/writing-wiki-pages/references/flowcharts.md
wiki: wrote .agents/skills/writing-wiki-pages/references/naming-and-grammar.md
wiki: wrote .agents/skills/writing-wiki-pages/references/page-standard.md
wiki: wrote .agents/skills/writing-wiki-pages/references/reference-pages.md
wiki: wrote .agents/skills/writing-wiki-pages/references/reference-standard.md
wiki: wiki.toml records wiki-builder 0.1.0
```

With `--no-skill`, it says so in place of the files:[^output]
```text
wiki: the skill was left out, as asked
wiki: wiki.toml records wiki-builder 0.1.0
```

When `wiki.toml` has a `[tool]` table with no `version` line, nothing is recorded, although the last line
still says it was.[^record]

## Exit codes

| Code | Condition | Message |
|---|---|---|
| `0` | the release is recorded[^exit] | `wiki: wiki.toml records wiki-builder 0.1.0` |
| `1` | there is no `wiki.toml` to record it in; the skill has already been written, and is not listed[^exit] | ``wiki: there is no wiki.toml in /path/to/notes/docs/wiki; write one with a [site] name and at least one [[section]], then run `wiki sync` again`` |
| `2` | both skill options are given; the one given second is named first[^exit] | `wiki sync: error: argument --skill-dir: not allowed with argument --no-skill` |
| `2` | there is no wiki where it was pointed[^exit] | `wiki: no wiki at nowhere` |
| `2` | an option it does not know[^exit] | `wiki: error: unrecognized arguments: --unknown` |

[^sync]: `src/builder/cli.py` — `sync()`, and `record_version()` in `src/builder/config.py`.
[^group]: `src/builder/cli.py` — `main()` puts `--skill-dir` and `--no-skill` in one mutually exclusive
    group; `skill_home()` joins a given folder to the project.
[^home]: `src/builder/cli.py` — `skill_home()` tries `.agents/skills`, then `.claude/skills`, and falls
    back to `.claude/skills`.
[^output]: `src/builder/cli.py` — `sync()` prints each file it wrote, the line for a skill left out and
    the recorded release, and deletes nothing.
[^record]: `src/builder/config.py` — `record_version()` replaces the first line starting `version` after
    `[tool]`, and adds nothing when no such line follows.
[^exit]: `src/builder/cli.py` — `main()` returns 2 with no wiki and 1 for a `WikiError`, and argparse exits
    2 when both options are given or an option it does not know is; `sync()` copies the skill before `record_version()` in
    `src/builder/config.py` raises `WikiError` for a missing `wiki.toml`.
[^noskill]: `src/builder/cli.py` — `main()` declares `--no-skill` off by default, and `run()` passes
    `skill=not args.no_skill` to `sync()`, which writes the skill only when asked and records the release
    either way.