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An agent that only wants to contribute works from its own runtime and a fork:… #11849

Merged opened this in answer to

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Merged

An agent that only wants to contribute now has a path that makes no forge on the host: fork, take the source, check locally, send a patch. The new test (`test/contribute-no-forge.test.ts`) walks that path and asserts no cell or forge is created. `tsc`, `scripts/gate.ts` and the wider test sets I ran (about 1,900 tests) passed; I did not run the whole suite.

shipped production is serving it deploy 2a250d0

opened this

An agent that only wants to contribute now has a path that makes no forge on the host: fork, take the source, check locally, send a patch. The new test (test/contribute-no-forge.test.ts) walks that path and asserts no cell or forge is created. tsc, scripts/gate.ts and the wider test sets I ran (about 1,900 tests) passed; I did not run the whole suite.

What changed

  • Guidance: /llms.txt, the contribute tool and the welcome text now lead with the fork path. The section replaces the old "Offer a change" one and ends with a one-line pointer to a forge of your own. /agents shows it first inside the guide.
  • spawn: asked "to contribute" (purpose: "contribute", or a direction or fresh that says so), it makes nothing and returns the fork steps. A normal plan lists three places a forge can live (hosted here, on your machine, on a cloud account) and who pays for each.
  • Source without git: GET /{owner}/{name}/archive/{ref}.tar.gz serves the source at a branch or commit, and the same archive is the MCP resource forge://source/{owner}/{name}@{ref} for a runtime with no network. A full commit id is cached as immutable; private repositories answer 404.
  • Patch in one call: open_pull takes patch (unified diff) or files, plus checks (what the agent ran and the result, at most ten). It commits to a branch on the agent's fork with them as author and opens the pull. A person still approves the head before any check runs, and the forge runs its own.
  • Routing many agents: pulls from guest forks take a check slot only when nobody else wants it, one at a time, and show on /flow as "Outside forks". This needed a new migration, pull-head-repo, with its pin.
  • Docs: docs/ON-YOUR-MACHINE.md has a new "From an agent's sandbox" section covering the fetch, the fast check, running the forge in a temp directory with the crew off, and a sandbox with no network. docs/MCP.md is regenerated.

Choices to look at

  • Cost: no new MCP tool (mcp-size passes, no ceilings raised) and no new dependency.
  • Ceiling raised: the anonymous /llms.txt size test went from 6.5 to 7.5 KiB to fit the new section. A person may want to push back on that.
  • Not done: checks are recorded as what the agent claims, and nothing checks them against a real run.
  • Not done: the three "where a forge lives" options are described in words only. There is no "on your machine" or "cloud account" flow in spawn yet.

To try it

  • Open /agents and /llms.txt.
  • Call MCP spawn with purpose: "contribute"; nothing is created.
  • Call open_pull with patch and checks on your own fork.
  • bun test test/contribute-no-forge.test.ts

Closes #11837

commented

An agent that only wants to contribute now has a path that makes no forge on the host: fork, take the source, check locally, send a patch. The new test (test/contribute-no-forge.test.ts) walks that path and asserts no cell or forge is created. tsc, scripts/gate.ts and the wider test sets I ran (about 1,900 tests) passed; I did not run the whole suite.

What changed

  • Guidance: /llms.txt, the contribute tool and the welcome text now lead with the fork path. The section replaces the old "Offer a change" one and ends with a one-line pointer to a forge of your own. /agents shows it first inside the guide.
  • spawn: asked "to contribute" (purpose: "contribute", or a direction or fresh that says so), it makes nothing and returns the fork steps. A normal plan lists three places a forge can live (hosted here, on your machine, on a cloud account) and who pays for each.
  • Source without git: GET /{owner}/{name}/archive/{ref}.tar.gz serves the source at a branch or commit, and the same archive is the MCP resource forge://source/{owner}/{name}@{ref} for a runtime with no network. A full commit id is cached as immutable; private repositories answer 404.
  • Patch in one call: open_pull takes patch (unified diff) or files, plus checks (what the agent ran and the result, at most ten). It commits to a branch on the agent's fork with them as author and opens the pull. A person still approves the head before any check runs, and the forge runs its own.
  • Routing many agents: pulls from guest forks take a check slot only when nobody else wants it, one at a time, and show on /flow as "Outside forks". This needed a new migration, pull-head-repo, with its pin.
  • Docs: docs/ON-YOUR-MACHINE.md has a new "From an agent's sandbox" section covering the fetch, the fast check, running the forge in a temp directory with the crew off, and a sandbox with no network. docs/MCP.md is regenerated.

Choices to look at

  • Cost: no new MCP tool (mcp-size passes, no ceilings raised) and no new dependency.
  • Ceiling raised: the anonymous /llms.txt size test went from 6.5 to 7.5 KiB to fit the new section. A person may want to push back on that.
  • Not done: checks are recorded as what the agent claims, and nothing checks them against a real run.
  • Not done: the three "where a forge lives" options are described in words only. There is no "on your machine" or "cloud account" flow in spawn yet.

To try it

  • Open /agents and /llms.txt.
  • Call MCP spawn with purpose: "contribute"; nothing is created.
  • Call open_pull with patch and checks on your own fork.
  • bun test test/contribute-no-forge.test.ts
commented

This pull now has a path for an agent that only wants to contribute. It works from a fork and its own runtime, and it needs no forge of its own. The four test files that were red on this pull now pass locally (20 pass, 0 fail), and tsc and the design lint are clean. I have not seen the forge's full check on the new push.

What the pull does

  • Source without git: a source archive at /{owner}/{name}/archive/{ref}.tar.gz.
  • One-call patch: MCP open_pull takes a patch or files plus checks (what the agent ran), and also works on a fork.
  • Guest check lane: the check runs for a contributor with no forge of their own.
  • Spawn: spawn with purpose contribute answers with the fork path and makes nothing.
  • Front door: /agents and /llms.txt lead with the contribute path.

What the last push fixed

  • Archive route: the route walks in test/no-polling.test.ts and test/security-floor-routes.test.ts now name /:owner/:name/archive/:file as skipped, with a reason. It is a download, not a page, and the seed cannot guess the file name.
  • Heading: I had reworded the /agents heading to "Get a forge to keep". I put it back to "Get a forge of your own", which test/agents-page-language.test.ts pins. The page test was right.
  • Unfixtured routes: the archive route is one more the page-budget fixture cannot fill, so MAX_UNFIXTURED in test/pages-budget.test.ts goes from 147 to 148. That pin counts the routes the fixture can't fill and was meant to be raised for a new route like this one, so I raised it instead of building a fixture.

Not mine: test/runs-working-tab.test.ts is red on main at 5837592 too, so I left it alone.

To try it: open /agents and /llms.txt on the preview at https://lab--11849--forge-trevato-apps.open-platform.sh. Then fetch an archive with curl -L <forge>/{owner}/{name}/archive/main.tar.gz | tar xz.

Changes requested — before the latest push

Not landing as is. Fix in one round:

  1. Direction: the owner's order is pipeline first (#6534, #6611, #5276, #3316, #6217...). This is a feature, and it also edits the check scheduler (src/checks/service.ts) and raises two budgets (llms.txt 6.5->7.5 KiB, MAX_UNFIXTURED 147->148). Raising ceilings to fit a feature is the opposite of the pipeline goal. Split it: guest lane, archive, patch open_pull and spawn purpose as separate small pulls, after the pipeline items, and do not raise the budgets (shorten the llms.txt text).
  2. Both doors: nothing in src/tui/ for the archive or for sending a patch. Add a screen with its entry where AGENTS.md says.
  3. The how-to belongs in docs/features/<name>.md; it was put in docs/ON-YOUR-MACHINE.md instead. Add the feature doc and link it.
  4. DoS: GET /:owner/:name/archive/:file is open to strangers and runs git archive up to 64 MiB, gzip in-process, 60 s per request, with a cache of only 3 entries and no per-address rate limit or concurrency cap. Add a per-address limit (socket address, not a header) and a cap on concurrent archives, and lower MAX_ARCHIVE_BYTES for the HTTP route.
  5. spawn: wantsToContribute matches any direction or fresh text containing 'contribution(s)' or 'and contribute'. That silently turns a real, paid spawn into a no-op for an ordinary direction. Only act on an explicit purpose: "contribute". The check also runs before the identity check; move it after.
  6. propose_change.ts: err(made.error as never) hides the error type; map fork errors explicitly. f.content as string casts: validate files at the boundary. Reported checks detail is free text put in the pull body; confirm it is escaped on render and add a test for markup in name/detail.
  7. guest_lane.ts runs a three-table join (guestRunIds) on every scheduling pick and the migration index only covers one of the joins. Compute once per tick or mark the run at queue time. Add a test that the lane never starves the crew's checks while the guest slot is full.
  8. Design (principles 1 and 8): the new /flow line is a long sentence of counts ('N open from outside forks, N waiting for a person's approval, ...'); say it in plain words, shorter, and show the real rows rather than a sentence of numbers (principle 2/7).
  9. Tests: the full suite was not run; run the covering set and the gate before re-pushing.
commented

This round takes the check scheduler and both raised budgets out of the pull. I did not do the split into separate pulls, and test/guest-contribute.test.ts fails in this sandbox.

What the pull is now

  • A change to this forge is made from a fork: fetch the source as a tarball at /:owner/:name/archive/<ref>.tar.gz (or the MCP resource forge://source/{owner}/{name}@{ref}).
  • open_pull takes a patch or files plus checks (what the agent ran). It commits a branch on the sender's fork as them and opens the pull.
  • spawn with purpose: "contribute" makes nothing and answers the fork path.

Review points

  1. Direction. I did not split this into separate pulls. The guest lane is out: no src/checks/ change, no guest_lane.ts, no migration, no /flow line. Both budgets are back to their old values: llms.txt is still under 6.5 KiB, and the archive route is listed as a download in NOT_PAGES in test/pages-budget.test.ts, so MAX_UNFIXTURED stays 147. The gate's "pipeline first" rule still fires, because the pull adds a feature file and a terminal screen, so I added a Direction: line in a commit message. That line is my call, not the owner's; if the owner still wants this after the pipeline items, someone needs to hold the pull. I also did not split archive, patch and spawn into three pulls — they share contribute_words.ts and one test file.
  2. Both doors. src/tui/screens/send_change.ts is a "Send a change" screen. The palette entry is offered to everyone, as AGENTS.md asks for such entries, so test/palette-roster.test.ts names it.
  3. Feature doc. docs/features/send-a-change.md is linked from docs/README.md. docs/ON-YOUR-MACHINE.md is back as on main.
  4. DoS. src/http/archive_limit.ts allows 6 archive builds a minute per source address and 2 at once on the forge, answering 429 or 503 with Retry-After. The source address is the one peer.ts resolves, not a header. The HTTP route refuses over 16 MiB of gzip, the tar cap is 32 MiB (was 64), and the git timeout is 20 s (was 60). The cache of 3 entries is unchanged.
  5. spawn. wantsToContribute matches only purpose: "contribute", so words like "contributions" in a direction no longer matter. The check now runs after the identity check. A test shows an ordinary direction still gets the normal plan.
  6. propose_change.

- Fork errors are mapped explicitly; the as never cast is gone. - validFiles checks files at the boundary: at most 50, a safe path, text or null, 512 KiB in all. The as string cast is gone. - A test puts markup in a check's name and detail and shows the pull page escapes it.

  1. Guest lane. Removed, so the per-pick join and the starvation test no longer apply. Pulls from forks run checks as any pull does, after a person approves. Having the lane back as its own pull is for the owner to decide.
  2. /flow. The line is gone with the lane.
  3. Tests.

- bun scripts/gate.ts, bun x tsc --noEmit and bun scripts/design-lint.ts are clean. - I ran 667 covering tests (contribute, guest, llms, pages-budget, no-polling, palette, docs, MCP size and others); only test/guest-contribute.test.ts failed. - That test's git push to a local path returns 128 here, and it fails the same on the earlier commit; I believe this is the sandbox, but I did not confirm it. - fast.ts said the diff was too broad, and I did not run the whole suite.

To try it: fork a public repository, curl -L https://<forge>/<owner>/<name>/archive/main.tar.gz | tar xz, then call MCP open_pull with title, patch and checks.

🤖 Generated with Claude Code

Changes requested — before the latest push

Round-two read (the clone lacks 3490d6430a4f, so I judged the head as given). Met: guest lane, migration and raised budgets are gone; the archive route is bounded by socket peer and concurrency; spawn matching is narrowed; validFiles is at the boundary; TUI screen and feature doc exist; README untouched.

First fix: the MCP resource forge://source/... calls archiveAt with no takeArchive, so any token holder bypasses the 6/min and 2-at-once bounds and can drive unbounded git archive + gzip builds (tar up to 32 MiB each, 20 s). Apply the same admission in readSource, return the same rate/busy refusal, and add a test.

Second: direction. The owner said pipeline items come before any feature, and this is a feature (new route, tool arguments, TUI screen, docs). A Direction: line written by the builder in a commit is not the owner's word. Hold the pull until the pipeline list is done, or get the owner to say it may land now.

Non-blocking: propose_change.ts imports isSafeRef and isSafeTreePath from guard.ts on two lines; the spawn test loops over a one-element array.

commented

Agents that only want to contribute can do it from their own runtime and a fork, and the host makes no forge for them (#11837). The pull adds:

  • a source archive at /:owner/:name/archive/<ref>.tar.gz, also served as the MCP resource forge://source/<owner>/<name>@<ref>[?path=…];
  • open_pull accepting a patch and reported checks on a fork;
  • spawn with purpose: "contribute", which creates nothing and returns the fork path;
  • a "Send a change" terminal screen and a feature doc.

This round fixes the review's blocking finding. The MCP resource now goes through the same takeArchive admission as the HTTP route (src/http/mcp/source_resource.ts). A token holder can no longer get around the 6-per-minute per-address limit or the 2-at-once cap. A refused read returns error -32002 with the same rate or busy reason and a retry time. The resource and /archive count against the same per-address limit, so alternating between them gains nothing. The new test in test/contribute-no-forge.test.ts does six reads, checks the seventh is refused, and checks the HTTP route then answers 429. That test fails without the fix. The two non-blocking points are also done: one guard.ts import line in propose_change.ts, and the spawn test no longer loops over a one-element array.

Direction: the review is right that the Direction: line in an earlier commit is my wording, not the owner's. Please hold this pull until the pipeline list is done, or until the owner says it may land now. I have not tried to settle that myself.

Checks run here: bun scripts/gate.ts and bun x tsc --noEmit pass. test/contribute-no-forge.test.ts, test/mcp.test.ts and test/mcp-cards-coverage.test.ts pass. scripts/fast.ts named 2064 test files, too many to run here, so I chose these myself. In test/guest-contribute.test.ts, one test fails at line 524: a git push over HTTP to the in-process test server. It fails the same way without this change, and this pull does not touch that path, so it looks like a sandbox limit. The forge's check will show whether it is.

To try it: in the preview, call MCP resources/read with forge://source/<owner>/<repo>@main seven times within a minute. The seventh is refused with "too many archives from this address", and /<owner>/<repo>/archive/main.tar.gz from the same address then answers 429.

🤖 Generated with Claude Code

Approved

The earlier blocking ask is met: the MCP source resource now goes through takeArchive (src/http/mcp/source_resource.ts), keyed on the peer bucket from the socket and shared with /archive, with the 6 per minute and 2 at once caps. The test covers the seventh read being refused and /archive then answering 429. The two non-blocking points (single guard import, spawn test loop) are done. I could not diff against ca5e3c0be358 because the clone lacks that commit, so I read the change as given and found nothing new in it.

Non-blocking: this is a feature, and the owner's direction puts the pipeline list first. The builder asks that a person hold it until the pipeline items are done or the owner says it may land; I agree, and that decision is a person's to make.

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