| name | latest-docs |
| description | Fetch, cache, and expose the latest official documentation for registered libraries, SDKs, and APIs. Turns Luci's "always check latest official docs" rule from prose into an executable contract. |
latest-docs skill
latest-docs is the read-side enforcer of the project's documentation rule: training-data recall is not authoritative. Every agent that writes code against an external library must either invoke this skill directly or dispatch to doc-scout, which delegates to it. The skill fetches from canonical vendor URLs, writes a Markdown cache file, and surfaces a stale warning when the cache is past its TTL.
All fetch operations are network-read-only. The only mutation path is register, which is gated behind --i-approve and audit-logged.
Commands
list
latest-docs list
Enumerates every entry in registry.json. For each library, prints:
- library name
- type (
markdown or html)
- last-fetched date (or
never if no cache file exists)
- whether the cache is stale relative to the entry's TTL
- canonical URL
fetch
latest-docs fetch <lib> [--refresh]
Fetches and caches documentation for <lib>.
Without --refresh: if a cache file already exists and its fetched_at timestamp is within the entry's TTL, prints a cache-hit message and returns immediately. No network call is made.
With --refresh: skips the TTL check and always fetches from the network.
On success, prints the path to the written cache file. On HTTP failure, exits non-zero with the status code. On network error, exits non-zero with the error message.
If <lib> is not in the registry, exits non-zero with a message directing you to register first.
show
latest-docs show <lib> [--section=<header>]
Prints the cached documentation for <lib>. If no cache file exists, performs an automatic fetch first (equivalent to fetch without --refresh).
If the cache is older than the entry's TTL, the first line of output is a stale warning:
[stale 9.2 days; ttl 7; refresh with: latest-docs fetch @honcho-ai/sdk --refresh]
--section=<header> grep-matches a Markdown header by substring (case-insensitive) and prints the matched header plus everything under it, stopping at the next heading of the same or higher level. If no matching header is found, exits non-zero.
register
latest-docs register <lib> <url> [--type=markdown|html] [--selector=<tag>] [--ttl-days=<N>] [--i-approve]
Adds or updates a registry entry for <lib>.
Without --i-approve, prints a DRAFT preview of what would be written and exits 0. No file is modified:
DRAFT — would register:
new-lib
url: https://example.com/docs
type: markdown
selector: (none)
ttl_days: (default)
Rerun with --i-approve to write to registry.
With --i-approve, writes the entry to registry.json and appends one JSON line to .pi/.docs-registry-log.jsonl (mode 0600). New entries always start with "verified": false; after confirming the URL fetches correctly, flip the flag to true by editing registry.json directly (there is no CLI flag for this).
Flags:
| Flag | Default | Meaning |
|---|
--type=markdown|html | markdown | markdown writes the response body verbatim. html scopes to --selector and converts to Markdown. |
--selector=<tag> | (none, full page) | Tag-name selector applied before HTML conversion. See HTML scoping below. |
--ttl-days=<N> | (registry default) | Per-entry TTL override, in days. |
--i-approve | off | Required to write any change. |
Cache layout
.pi/.docs-cache/
@honcho-ai-sdk/
2026-04-24.md
2026-05-01.md # re-fetched after expiry
hono/
2026-04-24.md
Library names are sanitized for use as directory names: forward slashes are replaced with hyphens. @honcho-ai/sdk becomes @honcho-ai-sdk. The @ prefix is preserved.
Each cache file is named <YYYY-MM-DD>.md (the date at fetch time). The skill retains old dated files — it does not delete them. show and list always use the most recent one.
Cache file frontmatter
Every cache file begins with a YAML block:
---
source_url: https://raw.githubusercontent.com/plastic-labs/honcho/main/sdks/typescript/README.md
fetched_at: 2026-04-24T12:00:00.000Z
content_hash: a3f7c8d1e4b290ab
---
content_hash is the first 16 hex characters of the SHA-256 of the body. It is present for change-detection purposes but is not currently compared automatically.
TTL behavior
Staleness is evaluated against the entry's effective TTL, resolved in this order:
ttl_days field on the registry entry (per-entry override)._meta.ttl_days_default in registry.json (project-wide default, currently 7).- Hardcoded fallback of
7 if neither is present.
list appends (stale) to the last-fetched date when the age exceeds the TTL. show prepends a stale-warning line. fetch without --refresh respects the TTL as a cache-hit guard.
Registry schema
registry.json is a plain JSON object. Keys are library names (e.g., @honcho-ai/sdk). The special key _meta holds registry-wide settings.
Entry fields
| Field | Type | Required | Description |
|---|
url | string | yes | Canonical documentation URL. |
type | "markdown" | "html" | yes | How the response body is processed before caching. |
selector | string | no | HTML tag-name selector for scoping before conversion (type html only). |
ttl_days | number | no | Per-entry cache TTL in days. Overrides _meta.ttl_days_default. |
verified | boolean | no | Whether the URL has been live-confirmed by a successful fetch. Defaults to false on all register writes. Flip to true manually after a successful smoke fetch. |
_meta fields
| Field | Type | Description |
|---|
ttl_days_default | number | Default TTL for entries that don't specify ttl_days. |
note | string | Free-text note for human readers. |
Example entry
"@honcho-ai/sdk": {
"url": "https://raw.githubusercontent.com/plastic-labs/honcho/main/sdks/typescript/README.md",
"type": "markdown",
"ttl_days": 7,
"verified": false
}
HTML scoping and selector support
When type is html, the skill scopes the fetched HTML to the element matching selector before conversion. This concentrates the cache on the relevant documentation region and discards nav bars, footers, and cookie banners.
v1 limitation: tag-name selectors only. Supported values are bare tag names — main, article, section, body, etc. Class selectors (.content), id selectors (#docs), and attribute selectors are not supported; if the selector contains any character that is not [a-zA-Z], scoping is skipped and the full HTML body is converted. This is a deliberate no-op fallback, not an error.
The implementation uses an indexOf-based string scan on the lowercase HTML. See README.md for the rationale behind this approach.
Audit log
register --i-approve appends one JSON line to .pi/.docs-registry-log.jsonl:
{"ts":"2026-04-24T12:00:00.000Z","action":"create","lib":"new-lib","before":null,"after":{"url":"...","type":"markdown","verified":false},"approver":"luci"}
For updates (action: "update"), before is the prior registry entry. The log file is created mode 0600 and never truncated.
Example invocations
bun run .pi/skills/latest-docs/bin/latest-docs.ts list
bun run .pi/skills/latest-docs/bin/latest-docs.ts fetch @honcho-ai/sdk
bun run .pi/skills/latest-docs/bin/latest-docs.ts fetch @honcho-ai/sdk --refresh
bun run .pi/skills/latest-docs/bin/latest-docs.ts show hono
bun run .pi/skills/latest-docs/bin/latest-docs.ts show hono --section="Getting Started"
bun run .pi/skills/latest-docs/bin/latest-docs.ts register my-lib https://example.com/docs --type=html --selector=main
bun run .pi/skills/latest-docs/bin/latest-docs.ts register my-lib https://example.com/docs --type=html --selector=main --i-approve
Integration with doc-scout
doc-scout is the agent wrapper around this skill. Other agents that need library context dispatch to doc-scout rather than invoking latest-docs directly. This keeps the implementer, validator, and reviewer contexts uncluttered by raw HTML conversion output and limits network access to a single, auditable agent.
When calling this skill from a Claude context directly (rather than via doc-scout), the invocation pattern is:
/skill:latest-docs show <lib>
/skill:latest-docs show <lib> --section=<header>
