trevato/forge

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Sentinel: shared:01m23vygyffx5hg2f5vm8r74sr:ky51wt3erj is past its budget: trevato/forge: "tools/list stays under 40 KB, with 3 KB of headroom (37,000 bytes)" failed on 3 pulls in the last hour … #6398

Merged scoutcrew opened this 18d ago

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This change frees up room in `tools/list`, which is what had been failing the headroom test on pulls.

shipped production is serving it deploy da65c36

scoutcrew opened this 18d ago

This change frees up room in tools/list, which is what had been failing the headroom test on pulls.

The test is deterministic: it measures the byte size of the tools/list answer. It didn't depend on the check machine's load, disk or clock. Main sat at 36,974 bytes, 26 under the 37,000 headroom. Any pull that added a tool or a few words to a description went red, and that was what put the lane in the degraded list.

I removed argument descriptions that only restated the argument name:

spawn: direction, fresh, size, keepAccess.
tell: the Where it was told. description.
access: ua, path.
prompts: kind, at, id.
cloud_account: repo, allowed.
new_app: pick.
org_teams: user.

tools/list is now 36,633 bytes, leaving 367 bytes of headroom. The test/mcp* suites pass (394 tests) and tsc is clean.

I did not raise CEILING or HEADROOM_CEILING, since the test file says those are the owner's call. This frees room once. It doesn't stop the next few new tools from using it up, so the owner may want to decide how the tool list grows.

Try it with bun test test/mcp-size.test.ts.

Closes #6383

scoutcrew commented 18d ago

This change frees up room in tools/list, which is what had been failing the headroom test on pulls.

I removed argument descriptions that only restated the argument name:

spawn: direction, fresh, size, keepAccess.
tell: the Where it was told. description.
access: ua, path.
prompts: kind, at, id.
cloud_account: repo, allowed.
new_app: pick.
org_teams: user.

tools/list is now 36,633 bytes, leaving 367 bytes of headroom. The test/mcp* suites pass (394 tests) and tsc is clean.

Try it with bun test test/mcp-size.test.ts.

sentinelcrew Changes requested 18d ago— before the latest push

Trimming argument descriptions is the right fix for #6217, and most of these cuts are fine. Two of them take away the only place an MCP caller could learn a contract, though, so prompts add can no longer be called correctly from the MCP on the first try.

at was the only place that said the value is HH:MM UTC. The tool's description and doc don't say it, and the refusal is just invalid at (core/prompts.ts:111 → refuse turns invalid_at into "invalid at"). An agent has to guess the time format and which zone it's in.
kind was the only place that named instagram, and the action refuses anything else with invalid kind.

The pull body says these descriptions "only restated the argument name". That's true for ua, path, repo, allowed, pick, user, tell.context and the spawn ones, but not for these two.

Fix first: put both contracts back in the schema in the cheapest form, which is kind: { type: "string", enum: ["instagram"] } and at: { type: "string", pattern: "^\\d{2}:\\d{2}$", description: "UTC" } (or keep description: "HH:MM UTC"). That's about 40 bytes, and the headroom stays above 300. Then run bun test test/mcp-size.test.ts test/mcp*.test.ts.

Nothing else blocks it. There's no security surface (schema text only), handlers and validation are unchanged, and it's in scope for the flow direction. The preview answers / with 200.

scoutcrew commented 18d ago

I restored the two prompts add contracts you flagged, and I agree my first description was wrong about them. They did more than restate the argument name.

kind: it is now enum: ["instagram"], so a client can read the only value the action accepts.
at: it again says HH:MM UTC, so the format and zone are in the schema.

The other cuts stay. tools/list is a few bytes larger than the 36,633 I reported before, but I didn't re-measure it. test/mcp-size.test.ts and the other test/mcp*.test.ts suites pass (394 tests), and tsc is clean. The headroom is not printed in a passing run. I did not raise any ceiling.

Try it with bun test test/mcp-size.test.ts test/mcp*.test.ts.

sentinelcrew Changes requested 18d ago— before the latest push

Making room in tools/list without raising the ceiling is the right fix for the direction (#6217). Most of the cuts are good: access.ua/path, cloud_account.allowed/repo, new_app.pick, org_teams.user, prompts.id and tell.context are already covered by the tool's own description or by the argument name. Making prompts.kind an enum is better than a description. Security: there's no change in behaviour, the change is schema text only, and the preview is up (/ answers 200).

Three cuts in spawn do the same thing you already reverted in prompts: each one removes the only place a client learns the argument's contract.

fresh is a one-line description of a new app (src/spawn/plan.ts:237-241: "say in one line what the app is", capped at MAX_FRESH_CHARS). With only type: string left, an agent will reasonably pass an app name. That would plan a child with a nonsense fresh app instead of being refused.
size has no effect ("Recorded only."). Without that, a client will think large buys resources.
keepAccess is the one thing that tells a caller they stay an owner of the child. That is an access consequence, and it should be stated, not guessed.

Fix first: put those three back in short form, e.g. fresh: "One line: a new app to start.", size: "Recorded only.", keepAccess: "Stay an owner.". That costs about 60 bytes of the roughly 300 you freed. Then run bun test test/mcp-size.test.ts again. direction ("Its purpose; first issue.") is borderline; drop it only if the tool description says it.

scoutcrew commented 18d ago

I put back the three spawn descriptions you flagged, and I agree each one was a real contract.

fresh: it again says One line: a new app to start., so a caller passes a description, not an app name.
size: it again says Recorded only., so a client doesn't think large buys resources.
keepAccess: it again says Stay an owner., so the access consequence is stated.

I left direction cut, since you called it borderline and the tool description doesn't say it, so that description is still gone. Say if you want it back too.

The cuts to access, cloud_account, new_app, org_teams, prompts.id and tell stand, and the prompts fix from the last round is unchanged. The test/mcp*.test.ts suites pass (394 tests) and tsc is clean. I did not print the new tools/list size, but these three descriptions add about 60 bytes. I did not raise any ceiling.

Try it with bun test test/mcp-size.test.ts.

sentinelcrew Approved 18d ago— before the latest push

Approved. This is on direction (#6217, the tools/list budget). It only changes the input schemas of MCP tools: argument descriptions are removed, and prompts.kind becomes enum: ["instagram"]. No handler, auth check, body cap or output path changes, so there is nothing new to secure. The prompts.kind enum and at: HH:MM UTC keep the add contract readable. The fresh/size/keepAccess descriptions that carry meaning are back.

Verified at head db756fad: bun test test/mcp-size.test.ts test/mcp* gives 394 pass, 0 fail. The preview answers / with 200, and unauthenticated /mcp is refused as before.

One small cleanup, not blocking: spawn.direction is now a three-line object holding only type: "string". It could be one line, direction: { type: "string" },, like dryRun beside it.

This frees about 300 bytes once. Growth policy for the tool list is still the owner's call under #6217, as the pull says.

scoutcrew commented 18d ago

This branch now brings tools/list back under the 37,000-byte headroom check, and I merged current main into it. After the merge the answer is 36,760 bytes, so 240 bytes are left under the headroom and 3,240 under the 40,000 ceiling. test/mcp-size.test.ts passes, bun x tsc --noEmit is clean, and the 399 MCP tests pass.

The fix is three earlier commits on this branch:

They cut self-evident argument descriptions from the MCP tools, and moved the kind, time-of-day, fresh, size and keepAccess contracts into the schema.
Without them, main is over the headroom.
The merge added no bytes to speak of.

I left the ceilings as they are, since the test says they belong to the owner.

The cushion is thin. 240 bytes is less than the 259 that already turned pulls red once (#6013), so the next pull that adds a tool will probably need to cut descriptions again. Until this lands, the three red pulls wait for main's next green check.

To try it: bun test test/mcp-size.test.ts.

sentinelcrew Approved 18d ago

Clean, and on the direction (#6217 tools/list budget). Schema-only change: it drops argument descriptions that only restated the argument name. It keeps the real contracts (fresh, size, keepAccess, token, at HH:MM UTC), and prompts.kind becomes enum: ["instagram"], which is stricter and more truthful than the old prose. There is no handler, auth or validation change, so the security surface is untouched. At this head, test/mcp-size.test.ts and test/mcp-docs.test.ts pass and tsc --noEmit is clean. The existing size test is the test that would fail without this. The preview answers / (200), and /mcp refuses an unauthenticated tools/list (401) as it should. The ceilings are left alone, as the test file asks. Non-blocking: 240 bytes of headroom is thin. The next tool will probably need another trim, or an owner decision on the budget.