feat: add built-in update-config skill

[liruifengv]

Related Issue

No linked issue — the problem is explained below.

Problem

Editing kimi-code's own configuration (config.toml and tui.toml) by hand is error-prone: a malformed TOML file silently disables every setting in it, and rewriting a file from scratch can drop existing entries, comments, or formatting. There was no guided, safe path for letting Kimi edit its own config.

What changed

Adds a built-in, inline update-config skill so a user can ask Kimi to inspect or edit its own config files. The skill:

• Treats the official config docs as the single source of truth (fetched via FetchURL) and reads the target file before any change.
• Edits a copy (cp to a *-new candidate, then Edit) instead of rewriting from scratch, so existing sections, entries, and comments are preserved.
• Validates the candidate with kimi doctor before overwriting, takes a timestamped backup, then swaps it in.
• Tells the user which reload command applies (/reload for config.toml, /reload-tui for tui.toml).

Also documents tui.toml on the config files page (en + zh).

Note: the validation step uses the kimi doctor command, which lands in a separate change — merge order should ensure kimi doctor is available before this skill ships.

Checklist

• I have read the CONTRIBUTING document.
• I have linked a related issue, or explained the problem above.
• I have added tests that prove my feature works.
• Ran gen-changesets skill, or this PR needs no changeset.
• Ran gen-docs skill, or this PR needs no doc update.

[changeset-bot]

🦋 Changeset detected

Latest commit: 5904cc7

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 4 packages

Name	Type
@moonshot-ai/agent-core	Minor
@moonshot-ai/kimi-code	Minor
@moonshot-ai/acp-adapter	Patch
@moonshot-ai/migration-legacy	Patch

Not sure what this means? Click here to learn what changesets are.

Click here if you're a maintainer who wants to add another changeset to this PR

[pkg-pr-new]

pnpm dlx https://pkg.pr.new/@moonshot-ai/kimi-code@5904cc7

npx https://pkg.pr.new/@moonshot-ai/kimi-code@5904cc7

commit: 5904cc7

[chatgpt-codex-connector]

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