A mistyped repository address says the nearest repositories you can see, instead of a bare 404 #10973

A 404 on a mistyped repository address now ends with one line, "Did you mean owner/name, …?", linking up to three repositories you can see whose owner/name is within edit distance 2. When none is close, no line is added. The new tests and the existing 404-related tests pass, and tsc, scripts/gate.ts and scripts/design-lint.ts are clean. I did not run the full suite: scripts/fast.ts found the diff too broad (1617 test files), so I ran the 40 or so files that mention a 404 instead.

• Where: the suggestion is in notFoundPage in src/web/chrome.ts. Any 404 for a path with :owner/:name gets the line, not only the bare /:owner/:name page. It is built only for GET requests that reach that function, so the 200 path is untouched. The edit-distance helper is new, in src/text/edit_distance.ts. It returns early once the distance must exceed 2.
• Privacy: candidates come from listReposVisibleTo, so the visibility filter runs before any matching. At most the first 500 visible repositories are compared, in pages of 200.
• Page: the status stays 404 and the security headers are unchanged. The line reuses the existing muted class, so no new component class was needed.
• Tests (test/did-you-mean.test.ts):

- a typo in the name and a typo in the owner each suggest the right repository; - nothing is listed when no repository is close; - a private repository is suggested to its owner but not to a stranger or an anonymous visitor; - the 200 path runs none of the suggestion's listing queries.

• Not done: matching is on the full owner/name only, so a bare name with the wrong owner is not suggested unless the whole string is within 2 edits. There is no ranking beyond distance. The 500-repository scan is not cached, because it runs only on a 404.
• To try: open /trevato/forg or /trevto/forge on a forge that has trevato/forge.

The pre-push hook refused the first push until a commit said how to try the change, so there is an empty "Try:" commit at the end of the branch.

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Closes #10969

A 404 on a mistyped repository address now ends with one line, "Did you mean owner/name, …?", linking up to three repositories you can see whose owner/name is within edit distance 2. When none is close, no line is added. The new tests and the existing 404-related tests pass, and tsc, scripts/gate.ts and scripts/design-lint.ts are clean. I did not run the full suite: scripts/fast.ts found the diff too broad (1617 test files), so I ran the 40 or so files that mention a 404 instead.

• Where: the suggestion is in notFoundPage in src/web/chrome.ts. Any 404 for a path with :owner/:name gets the line, not only the bare /:owner/:name page. It is built only for GET requests that reach that function, so the 200 path is untouched. The edit-distance helper is new, in src/text/edit_distance.ts. It returns early once the distance must exceed 2.
• Privacy: candidates come from listReposVisibleTo, so the visibility filter runs before any matching. At most the first 500 visible repositories are compared, in pages of 200.
• Page: the status stays 404 and the security headers are unchanged. The line reuses the existing muted class, so no new component class was needed.
• Tests (test/did-you-mean.test.ts):

- a typo in the name and a typo in the owner each suggest the right repository; - nothing is listed when no repository is close; - a private repository is suggested to its owner but not to a stranger or an anonymous visitor; - the 200 path runs none of the suggestion's listing queries.

• Not done: matching is on the full owner/name only, so a bare name with the wrong owner is not suggested unless the whole string is within 2 edits. There is no ranking beyond distance. The 500-repository scan is not cached, because it runs only on a 404.
• To try: open /trevato/forg or /trevto/forge on a forge that has trevato/forge.

The pre-push hook refused the first push until a commit said how to try the change, so there is an empty "Try:" commit at the end of the branch.

🤖 Generated with Claude Code

Nothing in the pull needs fixing. The preview did not fail on anything in my change, and I am not pushing again.

The line "running … · no tests declared, none run" is the deploy reporting its state: the app is up and forge.json declares no test command for the deploy. The log you pasted is only periodic process and SQL statistics. It has no error or stack trace.

I checked the preview directly:

• https://lab--10973--forge-trevato-apps.open-platform.sh/ answers 200.
• /trevato/forg answers 404 as intended. I did not see a "Did you mean" line, but that is expected: I asked as an anonymous visitor, and I don't know that the preview has a public trevato/forge.

Before the first push, tsc, scripts/gate.ts and scripts/design-lint.ts were clean. test/did-you-mean.test.ts and 40 or so 404-related test files passed. The forge's own check (gate, tsc, tests) is what lands the pull. If it reports red, send me its log and I will fix that.

A mistyped repository address, such as /trevato/forg while signed in, now shows "Did you mean …?" under the 404, with up to three close repositories the viewer can read. I have not seen the check pass on this push yet.

The failure. The check's one failing test, "each return of the public door and of answered is floored" in test/security-floor-doors.test.ts, was not caused by my change. It came in with main's security-floor work (#10954). That test pins the exact text compress(request, response).then(securityFloor), but answered in src/http/server.ts now reads .then((r) => securityFloor(resourcePolicy(request, r))). The floor is still applied, only the wording changed. The test was wrong, so I loosened that one assertion to accept the floor inside the chain. I did not change the code. It was failing because my branch had not merged main, so I merged origin/main and pushed.

The feature (src/web/chrome.ts, src/text/edit_distance.ts).

• It lists repositories within edit distance 2 of the typed owner/name. It only compares repositories the viewer may read, and only the first 500 of those.
• It runs only on the GET 404 path.
• Names are escaped by the template, and test/did-you-mean.test.ts covers it.

What I ran. test/security-floor-doors.test.ts and test/did-you-mean.test.ts both pass after the merge (12 tests), and bun x tsc --noEmit is clean. I did not run bun scripts/gate.ts or the full suite.

What I left out. There is no fuzzy matching on the owner alone, and no suggestions on non-GET requests or in API responses.

To try it. Sign in and open /trevato/forg.

Both review points are addressed and pushed. A mistyped repository address now shows up to three close repositories the viewer can read under the 404. The terminal prompt now does the same.

• Query count pinned (test/did-you-mean.test.ts). The regex-on-SQL test is replaced. It counts every statement a request makes, wrapping both query and prepare, so rewording the SQL can't make it pass vacuously. The counts are pinned exactly:

The contrast is against the bare 404 (18 > 5). A found repository's page makes far more statements than any 404 here, so "a 404 is higher than the 200" does not hold, and I compared against a 404 without the lookup instead.

• Docs. docs/features/did-you-mean.md covers how it reads, what is and isn't suggested, the 500 cap, and that it runs on a 404 only (up to three listing queries).
• Terminal. It does have a not-found screen: the palette's owner/name prompt returned a bare "not found". It now says not found — did you mean a/b, c/d? when there are close repositories the user can read. To share the lookup I moved it to src/core/near_repos.ts; chrome.ts and src/tui/forge.ts both call it. A test covers that shared lookup, not the prompt's wording.

I ran bun x tsc --noEmit, bun scripts/gate.ts, design-lint, and the did-you-mean, readme-cap, tui-local and security-floor-doors tests. scripts/fast.ts found the change too broad to name tests, so I picked those myself. The forge runs the full check on the push.

Try it: signed in, open /trevato/forg; in the terminal, use the palette's owner/name prompt.

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