search-first git:20260926.538565eA

Immutable. This exact content never changes and is served at /api/v1/blob/c83a2fd63fd1182d.

---
name: search-first
description: "Look outside before deciding: search the live web, registries and primary sources at decision time and bring back a report the caller picks from. Use for any question that may have an answer outside this repo — choosing a library or tool (\"which one is mainstream now\"), prior implementations of a design problem (\"is there already a skill / repo that solved this problem\"), whether a paper or post's claim applies here (\"does this claim apply to us\"), what an official spec or CLI does now (\"what does the official source say\"), the current state of practice (\"where do things stand now\"), or checking a claim against its primary source (\"does the primary source really say that\"). Also on 'search first', 'is there a package for', or /search-first. Other entry points: this repo or the local machine → Explore agent; a whole article's fact-check → the writing repo's fact-checker; bug fixes, refactors and config edits → implementation-chain."
compatibility: Developed and tested on Claude Code; portable to other Agent Skills-compatible agents.
user-invocable: true
origin: shimo4228
---

# /search-first — Look Outside, Report, Let the Caller Pick

The searcher reports what exists outside and how it differs from our situation. The
caller — the main loop, a build session, an RFC author — reads the report and decides what
to adopt, adopt in part, or leave. An established candidate that matches the need is adopted
by default; adopt-in-part means taking the library's code for one piece (its parser, its data
model) inside our own control flow, and a piece that transfers is worth the search (RFC-0022).
Building our own is chosen when the report names the gap no candidate fills.

## 0. State the question in text

Before the first tool call, write 2–3 sentences of plain assistant text: the question, which
row(s) of the table below it belongs to, and the constraints (language, existing deps,
license, budget). Tool arguments may mirror this text; the chat text is what lets the user
redirect before effort is spent.

When the need is code to write — an adapter, an API client, a parser, a utility — state it as
a Library / tool choice: which established library already does this. Asking which endpoint
to call or which algorithm to use yields an answer that can only be hand-coded.

## 1. Check this repo first

One `rg` / Glob pass through the relevant modules, skills and notes. The thing may already
exist here. Then go outside.

## 2. Search by question type

The rows are handles for where to look and when to stop. A question that fits none still
runs; a question that fits two uses both rows.

| Type | Where to look | What counts as evidence | Stop when |
|---|---|---|---|
| Library / tool choice | registries (npm / PyPI / crates), official docs, release pages | last release date, adoption (downloads, dependents, maintainers), license, dependency weight, the specific feature match, and whether it can run on our own HTTP client / runtime | 2–3 candidates have primary facts |
| Prior implementation | GitHub code search, skill / agent / MCP catalogs, this harness (Glob) | the actual file (SKILL.md, source) read, with path or URL | 2 actual files read, or 3 independent sources agree |
| Claim of a paper / post | the primary text (arXiv, official blog, the repo file itself) | subject, premises (data, scale, environment), kind of evidence, how ours differs | subject and premises are written down |
| Spec / official behavior | official docs, `--help`, changelog, running it | version and date, the observed result | one version-stamped primary fact |
| State of practice | the rows above mixed, plus first-person operating notes | each item dated and sourced, the range covered | the next search would settle nothing you can name |
| Primary-source check | the full text the claim points at (past the abstract) | the passage and its locator; per claim: supported / partial / unsupported / unverified | every claim carries one of the four |

Query live documentation at decision time (context7, the registry, the changelog itself):
recommendations age, and this harness treats external knowledge as stale within a week
(rule: knowledge-staleness).

## 3. Report

The report is the deliverable. Write it so the caller can pick from it:

- Every claim carries an **as-of date and a source URL**.
- When nothing turned up, write the **range**: search terms, sources, date — "not located
  within this boundary" leaves the next session a place to widen from.
- Say which you did for each source: **read the full text**, or **saw a snippet / abstract**.
- For every external finding give its **subject, its premises, and how our situation
  differs**; the caller decides what transfers.
- Judgement is **prose backed by facts** — dates, versions, the concrete feature match.
  Strengths and weaknesses in sentences; the canonical home of "evidence, not scores"
  (ADR-0026).

```
## Scope searched
terms / sources / as-of date — including what was not located
## Found
per item: what (URL) / subject and premises / kind of evidence (experiment, benchmark,
adoption, opinion) / how our situation differs / the part that transfers
## Verdict
per need: Adopt <candidate> / Adopt-part <candidate: the piece> / Build — the gap no
candidate fills
## Still unknown
```

An Adopt or Adopt-part that adds a dependency goes through the dependency intake of skill:
`implementation-chain` before it lands.

## 4. Quick vs Full

- **Quick (inline)** — a single obvious need: run 0–3 yourself with a few searches and write
  the report in chat.
- **Full (delegate)** — a non-trivial question: after step 0, hand the sweep to a
  **general-purpose subagent**. Its prompt carries the step-0 text, the table row(s), the
  report format, a call budget (about 15 searches / fetches), and the instruction to work
  with Read, Grep, Glob, WebSearch and WebFetch only — the Agent tool passes no tool
  allowlist, so this restriction lives in the prompt (rule: security names web content
  reaching a shell-capable agent as a threat surface). Read its report as the caller and
  record what you take.

## When the user says "skip research"

Record the skip in one line, then proceed without searching:

> Skipping research at your request — chosen without checking for an existing X; say the
> word for a 60-second scan.

## Example report (illustrative — format only; verify live before relying on any item)

```
## Scope searched
"markdown dead link checker" / "link check CI" — npm, crates.io, GitHub code search — 2026-09-14.
Not located: a checker that resolves wiki-style [[links]] in Obsidian vaults.
## Found
1. lychee (github.com/lycheeverse/lychee) — Rust CLI, checks http and local file links,
   `--offline` mode; last release 2026-08 (read: README + docs/usage.md). Assumes plain
   markdown links; our vault uses [[wikilinks]], so the http check transfers, the local
   resolution does not.
2. textlint-rule-no-dead-link (github.com/textlint-rule/textlint-rule-no-dead-link) —
   runs inside textlint, http only (saw: README). Transfers only if textlint is already in
   the pipeline; it is not in ours.
## Still unknown
Whether either tool can be pointed at a custom link resolver.
```