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Kyle Carberry
5040ab6fca
Adds a `diff_url:` term to the `q` search parameter on `GET /api/experimental/chats` so callers can look up the chat associated with a particular pull request, merge request, or any other URL persisted on the chat's diff status. ``` q=diff_url:"https://github.com/coder/coder/pull/123" ``` Match is case-insensitive. When the URL lives on a delegated sub-agent's diff status, the parent chat is returned so the relationship surfaces from a single lookup. <details> <summary>Design notes</summary> - **Forge-agnostic.** Reuses the existing `chat_diff_statuses.url` column rather than introducing a `pr:` vocabulary, since the SDK already documents the URL as "may point to a pull request or a branch page depending on whether a PR has been opened." Works for GitHub PRs, GitLab MRs, branch pages, etc. - **Composes with `archived:`.** The two terms can be combined: `q=archived:true diff_url:"..."`. - **Case handling.** The parser used to lowercase the entire `q` string up front, which would mangle URL path segments. Switched to lowercasing only the field key inside `searchTerms` (already happens there) and keeping the value as the caller typed it. The SQL comparison lowercases on both sides. - **Validation.** `diff_url` must be a syntactically valid HTTP(S) URL with a non-empty host. No forge-specific validation. - **Index.** Adds `idx_chat_diff_statuses_url_lower` on `LOWER(url)` so the lookup is cheap even on large datasets. - **Sub-agent fan-in.** `EXISTS` clause matches when the URL lives on the chat itself or any chat with `root_chat_id` equal to the chat's id, so a delegated sub-agent's PR pulls in its parent. - **Deferred.** Sentinels like `pr:any` / `pr:none` and a forge-agnostic state filter (`diff_state:open|merged|closed`) were intentionally left out of this change. They couple cleanly to a second forge or a clearer product call, and shipping them now would lock in vocabulary we may want to revisit. </details> ## Tests - `coderd/searchquery`: parser tests for valid URLs, case handling (key insensitive, value preserved), composition with `archived:`, and validation errors (non-HTTP scheme, missing host, malformed URL). - `coderd/exp_chats_test.go`: end-to-end coverage hitting `ListChats`. Verifies a root chat matches its own URL, a parent chat surfaces when only a sub-agent has the URL, lookups are case-insensitive, non-matching URLs return empty, and invalid URLs return `400`. --- _This PR was authored by a Coder Agent on behalf of @kylecarbs._