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4 changes: 2 additions & 2 deletions README.md
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Expand Up @@ -30,8 +30,8 @@ npx skills add firecrawl/skills
| [`firecrawl-build-scrape`](./skills/firecrawl-build-scrape) | Integrate `/scrape` for single-page extraction | Authored here |
| [`firecrawl-build-search`](./skills/firecrawl-build-search) | Integrate `/search` for discovery-first workflows | Authored here |
| [`firecrawl-build-interact`](./skills/firecrawl-build-interact) | Integrate `/interact` for clicks, forms, and dynamic flows after scrape | Authored here |
| [`firecrawl-research-index`](./skills/firecrawl-research-index) | Find papers in the research paper index — biomedical and life-science literature (PubMed, bioRxiv, medRxiv) plus arXiv preprints | Authored here |
| [`firecrawl-developer-index`](./skills/firecrawl-developer-index) | Answer developer questions from issues, pull requests, READMEs, and documentation pages | Authored here |
| [`firecrawl-research-index`](./skills/firecrawl-research-index) | Find papers (PubMed, bioRxiv, medRxiv, arXiv); `search --categories research` is a website filter, not this index | Authored here |
| [`firecrawl-developer-index`](./skills/firecrawl-developer-index) | Search issues, merged PRs, READMEs, and documentation for library/API/error/bug questions | Authored here |

## MCP Server

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72 changes: 27 additions & 45 deletions skills/firecrawl-developer-index/SKILL.md
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@@ -1,59 +1,41 @@
---
name: firecrawl-developer-index
description: Search issues, merged pull requests, READMEs, and documentation. Use when the question is how a library or API behaves, what an error means, or whether a bug was fixed; prefer this over a general web page.
description: |
Search issues, merged pull requests, READMEs, and documentation. Use when the question is how a library or API behaves, what an error means, or whether a bug was fixed; prefer this over a general web page.
allowed-tools:
- Bash(firecrawl *)
- Bash(npx firecrawl-cli *)
---

# Firecrawl Developer Index
# firecrawl developer

Answer a developer question from the primary source: the issue where the bug was reported, the merged pull request that fixed it, the README or documentation page that states the contract. A blog post that describes a behaviour is a weaker answer than the passage that defines it, so reach for the index first and the open web second.
Answer a developer question from the primary source: the issue, the merged pull request that fixed it, or the README/docs passage that states the contract.

There is **no fixed recipe**. Read the question, decide what kind it is, and choose the approach below. A literal error string wants a different move than "how do I do X". Don't run machinery a question doesn't call for.
## Quick start

## The tools, and what each is uniquely good at
```bash
mkdir -p .firecrawl
firecrawl developer "how do I configure retries" --limit 10 -o .firecrawl/developer.json --json
jq -r '.results[] | .id, .url, .passages[].text' .firecrawl/developer.json
```

- HTTP: **`GET|POST https://api.firecrawl.dev/v2/search/developer`**
MCP: **`firecrawl_developer_search(query, k?, skills?)`**
CLI: **`firecrawl developer <query> [--limit <n>] [--skills-only]`**
Ranked results over the whole index. Each carries `id` (`issue:owner/repo#123`), `url`, and the **matched passages in markdown**, so tables and code blocks survive. The artifact kind is the `id` prefix: `doc:`, `issue:`, `pull_request:`, or `readme:`.
The default first move for a developer question. It is the only surface that returns the passages, which is what lets you answer instead of pointing at a page.
`k` / `--limit` is 1–100 and defaults to 10. `skills="only"` / `--skills-only` restricts the search to agent-skill files.
Keyless; send `Authorization: Bearer $FIRECRAWL_API_KEY` for higher rate limits.
Run `firecrawl developer --help` for the full option list.

- MCP: **`firecrawl_search(query, categories: ["developer"])`**
CLI: **`firecrawl search <query> --categories developer`**
Developer hits in a `developer` group beside `web`, each with `url`, `title`, `description` (the matched passage), `position`, and `category: "developer"` — web results carry no `category`, so that is the field to key on when merging.
Use this when you are **already** running a web search and want developer sources weighed in the same call. It exposes none of the filters and no passage control.
HTTP: `GET|POST https://api.firecrawl.dev/v2/search/developer`. MCP: `firecrawl_developer_search`. Each hit carries `id`, `url`, `passages`. Kind is the `id` prefix (`doc:`, `issue:`, `pull_request:`, `readme:`). Hits do not carry a `type` field.

- MCP: **`firecrawl_scrape(url)` / `firecrawl_search(query)`**
CLI: **`firecrawl scrape <url>` / `firecrawl search <query>`**
General web fetch and search, for what no primary source states: a comparison between two libraries, an outage, a migration write-up, a project with no public repository or indexed docs.
Also the follow-through when a hit is the right page but you need all of it — `scrape` the result's `url`.
**Done when:** the answer quotes a matched passage and cites its `url` (fall back to `url` when `title` is absent), or you have moved to the open web because the index had nothing to say.

## Filters, and what each one costs you
## Tips

Only the HTTP surface takes these. On `GET`, pass `types=issue,pull_request` or repeat the parameter; on `POST`, pass arrays. All are optional.
- Default first move is `firecrawl developer`. Use `search --categories developer` only when you are already running a web search and want developer hits in the same call (no passage control, no index filters).
- Literal error or stack trace: search the string plus the library name. On HTTP, `types=["issue","pull_request"]`. Strip paths, line numbers, and ids, then retry.
- API contract: `readme` and `doc` are authoritative. A merged PR supersedes an issue report. Never answer from an opening report alone.
- Scope last: search the whole index, then narrow with HTTP `types`, `repos`, or `sources`. If a scoped search is empty, read the echoed `indexed` flag before concluding the repo is missing.
- Repository filters (`language`, `topic`, `license`, `min_stars`, …) drop `doc` results unless you also pass `sources`. `types`, `repos`, `sources`, `passages`, and those repository filters are HTTP-only.
- Comparison, opinion, news, or an unindexed project: `firecrawl search`, then `firecrawl scrape`.

- `types` — which of `doc`, `issue`, `pull_request`, `readme` to search. Defaults to all four. Narrowing here is the cheapest way to sharpen a query.
- `repos` (`owner/name`) scopes the repository half, meaning `issue`, `pull_request`, and `readme`; `sources` (documentation source ids, at most 20) scopes the documentation half, meaning `doc`. Passing both **unions** the halves rather than intersecting them. Both echo back in the response with `indexed: true|false` — that is how you tell "not in the index" from "found nothing".
- A filter that cannot match any requested `type` is a `400`, not an empty list: `repos` with no repository type in `types`, or `sources` without `doc`.
- `passages` (1–5, default 1) is the *maximum* passages per result, not a guarantee. Raise it when one page is clearly the right page but the first passage is the wrong part of it.
- `language`, `topic`, `license`, `min_stars`, `max_stars`, `archived`, `fork` describe a **repository**. Most documentation pages in the index have no repository behind them, so no repository fact can admit or exclude one. Send any of these without a `sources` scope and the response holds repository evidence only — `issue`, `pull_request`, `readme`. That is the design, not an index fault: do not retry it and do not report the index broken. To keep documentation, drop the repository filters, or scope the documentation half with `sources` and read the `sources` echo to confirm the id is indexed.
## See also

## Match the approach to the question

- **Literal error message or stack-trace string** → search the string itself plus the library name, with `types=["issue","pull_request"]`. Whoever hit it filed it. If nothing matches, strip the volatile parts (paths, line numbers, ids, addresses) and retry — the invariant middle of the message is what is indexed.
- **Conceptual "how do I do X"** → the full question in natural language, all four types. The answer is usually a `doc` or a `readme`; raise `passages` before raising `k`.
- **Known bug** → the issue reports it, the merged pull request *fixes* it, and the fix is what you want. Search `types=["issue","pull_request"]`, then re-query the issue's own terms scoped to its repo with `types=["pull_request"]`. A merged PR's passages tell you what changed and in which direction.
- **API contract** ("what does X return", "is Y required", "what is the default") → `readme` and `doc` are authoritative and a blog post is not. Use `types=["readme","doc"]`. If the contract looks like it moved, follow up with `pull_request` for the change that moved it.
- **Version-specific behaviour** → an issue's opening report describes the broken version; its resolution supersedes it. Raise `passages` to see further into the thread, and read the resolution and the linked pull request before answering. Never answer from an opening report alone.
- **Scoped to one library** → `repos=["owner/name"]` when you know the slug, plus `sources` if you want its docs in the same call. If a scoped search comes back empty, read the echoed `indexed` flag first: `false` means nothing from that repo or source can ever match and no rephrasing will help — drop the scope and search the whole index, or go to the web.
- **Ecosystem-wide** ("which libraries do X", "who else hit this") → no scope. Use `language` / `topic` / `min_stars` to keep to maintained repositories, accepting that this gives up all `doc` results.
- **Agent skills and tooling conventions** → `skills="only"` / `--skills-only`.
- **Comparison, opinion, news, or an unindexed project** → the open web. `firecrawl_search`, then `firecrawl_scrape` whatever deserves a full read. Combining is often right: take the contract from the index and the trade-off from the web.

## Principles

- **Quote the passage, cite the `url`.** The passages are the evidence; hand them over rather than paraphrasing them into a claim the reader can't check. `title` is frequently absent on `doc` results — fall back to `url`.
- **A merge supersedes a report.** When an issue and a pull request disagree, the merged pull request is the current behaviour. Say which one you read.
- **Scope last, not first.** Search the whole index, then narrow with `types`, `repos`, or `sources` once you know what the hits look like. Scoping first hides the result that would have told you where to look.
- **Go to the web when the index has nothing to say.** Trade-offs, ecosystem opinion, and anything about an unindexed project are web questions. Don't force them through the index, and don't dress a general web page up as a primary source.
- [Developer Index docs](https://docs.firecrawl.dev/features/developer)
- [firecrawl-research-index](../firecrawl-research-index/SKILL.md) — papers, not this index
- [firecrawl-build-search](../firecrawl-build-search/SKILL.md) — product-code `/search`
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