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ccea80b887
* feat(reviewer): inline AGENTS.md into reviewer system prompt Fetches AGENTS.md from the PR's head_sha via the GitHub contents API during reviewer setup and inlines it as a "Repository conventions" block in the system prompt. Mirrors how the per-repo review style prompt is already wired. The main agent has long had a mandatory step to read AGENTS.md after cloning, but the reviewer often skips cloning entirely (it can `gh pr diff` directly), so it never saw the file. Loading it deterministically means the reviewer judges findings against the project's own conventions instead of relying on the model to fetch the file itself. * fix(reviewer): fetch AGENTS.md from base_sha, not head_sha The reviewer inlines AGENTS.md into its system prompt. Reading from head_sha means a PR author can edit AGENTS.md in the same PR being reviewed and smuggle instructions like "ignore all bugs" / "publish no findings" into the reviewer's prompt. Switch to base_sha (the target branch's pre-PR state, which is trusted) and update the prompt text to reflect that the contents come from the base, not the head. --------- Co-authored-by: open-swe[bot] <open-swe@users.noreply.github.com>
73 lines
2.1 KiB
Python
73 lines
2.1 KiB
Python
"""Fetch ``AGENTS.md`` from a GitHub repo so it can be inlined into prompts.
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Used by the reviewer to deterministically load repo conventions into context
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without the model having to clone the repo and read the file itself.
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"""
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from __future__ import annotations
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import logging
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import httpx
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logger = logging.getLogger(__name__)
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# Cap the inlined content. AGENTS.md is meant to be a short conventions doc;
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# anything larger is probably accidental and would bloat every reviewer prompt.
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_MAX_AGENTS_MD_BYTES = 64 * 1024
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async def fetch_agents_md(
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owner: str,
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repo: str,
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ref: str,
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*,
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token: str | None,
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timeout: float = 10.0,
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) -> str | None:
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"""Fetch ``AGENTS.md`` at ``ref`` from ``owner/repo``.
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Returns the raw file contents, or ``None`` if the file is missing, the
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request fails, or the file exceeds the size cap.
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"""
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if not owner or not repo or not ref:
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return None
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url = f"https://api.github.com/repos/{owner}/{repo}/contents/AGENTS.md"
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headers = {
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"Accept": "application/vnd.github.raw",
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"X-GitHub-Api-Version": "2022-11-28",
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}
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if token:
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headers["Authorization"] = f"Bearer {token}"
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try:
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async with httpx.AsyncClient(timeout=timeout) as client:
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response = await client.get(url, headers=headers, params={"ref": ref})
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except httpx.HTTPError:
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logger.exception("Failed to fetch AGENTS.md from %s/%s@%s", owner, repo, ref)
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return None
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if response.status_code == 404:
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return None
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if response.status_code != 200:
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logger.warning(
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"Unexpected status %s fetching AGENTS.md from %s/%s@%s",
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response.status_code,
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owner,
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repo,
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ref,
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)
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return None
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content = response.text
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if len(content.encode("utf-8")) > _MAX_AGENTS_MD_BYTES:
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logger.info(
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"AGENTS.md in %s/%s@%s exceeds %d bytes; skipping inline",
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owner,
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repo,
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ref,
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_MAX_AGENTS_MD_BYTES,
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)
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return None
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return content
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