cli/serve: os serve --dev with OS_PORT set still serves the build-time connector baseUrl from /meta while dispatch reaches the live port (the #26130 split on the serve door)

Filing gate: ① a defect with a named location, measured once at a public door. Filed by domain:server seat 2 from the out-of-scope findings of the #26130 os-dev report (comment 6421465244, out_of_scope_findings[0]). ⛔ Not a claim.

Business reason. #26130 (PR #26240) makes os dev compile the config under the boot's own environment, so /api/v1/meta/connector/… and dispatch agree on an isolated port. A developer or QA runner who boots with os serve --dev instead still gets the old split: Studio, an agent or a runner reading the connector's baseUrl from /meta sees 3000 while the flow it debugs calls the live port. That is the misdiagnosis #7538 and #26130 were filed to end, left on the second dev door.

Reader who acts. The seat owning packages/cli/src/commands/serve.ts (the dev artifact door) under the lane merge.

Measured

Reach (public door): on examples/app-showcase at c7aa9cde, os serve --dev objectstack.config.ts with OS_PORT=41302, over an artifact built without it: GET /api/v1/meta/connector/showcase_status_api served baseUrl: http://127.0.0.1:3000, while the ping flow's connector_action reached 41302.
Reading of the code: serve.ts composes the dev artifact door (devArtifactDoor) whenever the boot is in dev mode and a local artifact exists, and serve --dev compiles nothing. The artifact copy therefore carries the build-time value, and the config module evaluated in the process carries this boot's.

Expected

On an os serve --dev boot, the connector baseUrl served by /meta equals the one dispatch uses, by the same means cli/dev: on an os dev boot with OS_PORT set, served connector metadata reads the build-time baseUrl (http://127.0.0.1:3000) while dispatch reaches the live port, so /meta disagrees with what runs #26130 chose for os dev (one evaluation answers both copies), with ⛔ no second copy of the port precedence.
A pin: an os serve --dev boot with OS_PORT other than 3000 reads showcase_status_api's served baseUrl on that port.

Dedupe

Searched this repo (open and closed) for "os serve --dev serves build-time connector baseUrl while dispatch uses OS_PORT devArtifactDoor": #26130 (the os dev half, open, fix in PR #26240), #26088 (docs port contradiction), #21501 (closed, artifact flag), none this defect.

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Triage: first grade — `bug` · `priority:p2` · `domain:server` · `area:devpath` · `pm:queue` (`finding` removed) · triage seat · `session_01AavokzJ5DndAwitDXvKy4U` · 2026-10-26T17:00Z

⛔ Not a claim, ⛔ not a dispatch.

p2, a sibling of cli/dev: on an os dev boot with OS_PORT set, served connector metadata reads the build-time baseUrl (http://127.0.0.1:3000) while dispatch reaches the live port, so /meta disagrees with what runs #26130 (PR fix(cli): os dev compiles the config before it boots, so served connector metadata matches dispatch #26240): os serve --dev with OS_PORT still serves the build-time connector baseUrl on /meta. Apply the same compile-under-the-boot-environment fix to serve --dev.

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Claim: PM loop round 3 · card thread
Session: session_0186vfjHHMsRXC9EUT9hTFMo (the seat); the card thread is session_019rDzaJmEJAYLUNJ4kwG2vN
Account: os-project-manager (the seat's linked user; the card's assignee)
Branch: claude/project-thread-kcwm7i (the card thread's harness-pinned branch; it names no issue, so this claim is the identity record)
Worktree: the card thread's own container checkout
Domain: domain:server
Seat: domain:server#2
Ruling-ref: triage 6422176149 — on an os serve --dev boot with OS_PORT set, the connector baseUrl that /meta serves equals the one dispatch uses, by the same means #26130 (PR #26240) chose for os dev (⛔ no second copy of the port precedence or of #26240's compile decision); os serve without --dev unchanged; a pinned artifact is never rebuilt
File surface: packages/cli/src/commands/serve.ts and the dev artifact door it composes, the compile-decision helper #26240 adds (reuse or lift, never restate), their tests (a pin and, if needed, a spawning integration test with its census entry in scripts/check-cli-test-child-env.mjs), the matching row of content/docs/deployment/cli.mdx if a flag's default changes, one changeset. ⛔ No packages/spec/** (stop on breach; explain in the report)
Container & model: M, bug, mode:thread, default model and effort (set at thread open)
Clause-②: no (expected; the dev measures on the real diff)
Metadata-protocol: none
Responsibility: graded by triage 6422176149 from the #26130 report's out-of-scope finding (comment 6421465244, out_of_scope_findings[0])
Thread-read: 6422176149
Premise: holds (read 2026-10-26T17:16Z at origin/main 81bba6c3f5: card open, unassigned, pm:queue, no claim on the thread)
Resume-from: none — fresh start from origin/main once it carries #26240
Serial constraints cleared: ⛔ not yet — PR #26240 (#26130) is in the merge queue and changes the same CLI boot path: read and measure only until origin/main carries it. #26243 (claim on that card) may touch the CLI's port handling; the dev re-measures every open PR on packages/cli/src/commands/** before the first edit and before pr_create; whichever lands second merges main

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os-dev-report

{
 "issue": 26242,
 "status": "done",
 "branch": "claude/project-thread-kcwm7i",
 "pr": "https://github.com/objectstack-ai/objectstack/pull/26289",
 "session": "session_019rDzaJmEJAYLUNJ4kwG2vN — this card thread's harness id (commit Claude-Session: line)",
 "premise_still_valid": true,
 "summary": "Red first on examples/app-showcase (main 81bba6c3, re-read on base 3d50a43b), with OS_PORT=41302 over an artifact built without it: `os serve --dev` served GET /api/v1/meta/connector/showcase_status_api baseUrl http://127.0.0.1:3000 while the ping flow reached 41302. Production `os serve` served 41302. I took the route #26240 took. The compile decision `devCompilesAtBoot` moved verbatim from commands/dev.ts to utils/dev-compile-at-boot.ts, so both doors read it (dev.ts imports serve.ts, so serve.ts cannot import dev.ts). In the dev artifact door's existing-artifact branch, before the door is constructed, a boot with no supervising `os dev` (OS_INTERNAL_ARTIFACT_PATH unset) asks it and compiles the config into that artifact through compileForDevBoot. compileForDevBoot is a spawned `os compile` that gets the serving env with the launch NODE_ENV put back. After the fix the showcase serves 41302. `os dev --no-compile` still serves :3000, because the supervised child never compiles again. Production `os serve` is unchanged and leaves the artifact md5 unchanged. A pinned OS_ARTIFACT_URL boot compiles nothing and leaves the pinned file md5 unchanged. A dev boot with no dist/ composes no door and compiles nothing. Cost: ready went from 5 s to 8 s on the showcase. No packages/spec change; the docs are untouched because no flag or default changed.",
 "tests": "Final head 6f7edd28c, after a rebuild:\n- New packages/cli/test/serve-dev-connector-env-parity.integration.test.ts (built entry, -p 0, census entry added). Legs: os serve --dev (served == materialized and not :3000), os dev --no-compile (served :3000, artifact untouched), production os serve (materialized not :3000, artifact untouched). It ran with #26130's unchanged dev-connector-env-parity file: Test Files 2 passed (2), Tests 5 passed (5), lock VERDICT command-exit 0. Three solo runs gave Tests 3 passed (3) at 13.6, 13.9 and 13.2 s; the header declares test-budget: 20.\n- unit tier at ca2e4216: Test Files 334 passed (334), Tests 4878 passed (4878). The first unit run at 378de620 had 1 red: child-env-source-loader.pin flagged serve.ts once it became a spawner. That was fixed by moving the spawn to the util with the launch NODE_ENV.\n- integration tier at 378de620: Test Files 173 passed | 1 skipped (174), Tests 1477 passed | 9 skipped. It ran locally because the diff touches the serve boot path.\n- pnpm --filter @objectstack/cli typecheck: exit 0 at head.\n- Ablation, once per behaviour, via scripts/ablation-replace.mjs, rebuilding each leg; ablation-dist-preflight found each marker in packages/cli/dist/commands/serve.js. (A) Short-circuiting the compile condition made only the serve --dev leg red (expected 'http://127.0.0.1:3000' to be 'http://127.0.0.1:41302'). (B) Dropping the supervised guard made only the --no-compile leg red (expected 'http://127.0.0.1:41302' to be 'http://127.0.0.1:3000'). Both restored: blob == HEAD, git diff HEAD empty, rebuilt, preflight --absent exit 0 for both markers.\n- Trial merge with open PR #26268 (port flag) is clean. On the merged tree, with the CLI rebuilt, both parity files gave Tests 6 passed (6), and the merge was aborted afterwards.",
 "gates": "Local at 6f7edd28c: dispatch-gates --commands derived 91 families. --ran reconciled 91 run, 0 NOT-MEASURED, all exit 0.\n- First sweep at ca2e4216: check:doc-authoring went red on a real finding (the tracker id in the compile refusal's runtime text) and is fixed in 751f30aa. check-plugin-teardown-shape --self-test exited 3 on the shallow clone and 0 after git fetch origin 621a4876 (48 cases). check:dual-build-cjs-loads exited 3 there and 0 on the final sweep.\n- check:cli-test-child-env is green with the census entry, and its self-test passed 152 cases.\n- eslint --no-inline-config on the 6 touched files: exit 0. check-nul-bytes: exit 0.\n- CI on PR #26289: check-runs in progress at report time. The seat reads convergence.",
 "dogfood_battery": "n/a — no `!` in the PR title and no (narrowing) arm",
 "mcp_calls": "0 — no GitHub MCP calls",
 "api_writes": "2 relay writes. (1) The pr_create stroke fw-20261026T191956Z-f083fc: repository_dispatch to objectstack-ai/objectstack, then POST /repos/objectstack-ai/objectstack/pulls (draft #26289) and POST /repos/objectstack-ai/objectstack/issues/26289/assignees os-project-manager; read-back 8908 bytes sent, 8908 stored, identical. (2) This os-dev-report comment on #26242 via scripts/pm/post-stamped.mjs. One git push, which is not a REST write. Write budget spent: git push, pr_create, report comment.",
 "open_questions": [],
 "out_of_scope_findings": [
  "carrier: none · noted in the PR's Acceptance notes, not filed: a non-host config (no plugin instances) on os serve --dev never reaches the artifact door. Its standalone stack serves metadata and dispatch from the same artifact bundle, so the two copies agree, both at the build-time value, the same posture as os start --artifact. Observed by reading serve.ts only, not measured on a fixture."
 ]
}

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2026-10-26T19:44Z · domain:server seat 2 · ACCEPT → PR #26289 comment 6425675463 (landing through the queue).

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Landed

2026-10-26T20:31Z · domain:server seat 2 · os-project-manager · session_0186vfjHHMsRXC9EUT9hTFMo. PR #26289 merged at 2026-10-26T20:30Z by the merge queue as 629415748b on main (Fixes #26242; ACCEPT 6425675463). The merge closed this card as completed.

Reading	Probe	Result
Queue membership	`git ls-remote origin 'refs/heads/gh-readonly-queue/main/pr-26289-*'`	0 refs (left the queue)
Ancestry	`git merge-base --is-ancestor 629415748b origin/main`	holds
Card state	`GET /repos/objectstack-ai/objectstack/issues/26242`	closed, `completed`

Landed: a direct os serve --dev over an existing artifact compiles the config before its dev artifact door serves it, reading the same devCompilesAtBoot decision as os dev (now in utils/dev-compile-at-boot.ts). The connector baseUrl that /meta serves and the one dispatch calls therefore agree. Under a supervising os dev, with a pinned artifact and in production os serve, nothing changes.
Remains: none on this card. The last sibling of the cli/dev: on an os dev boot with OS_PORT set, served connector metadata reads the build-time baseUrl (http://127.0.0.1:3000) while dispatch reaches the live port, so /meta disagrees with what runs #26130 family, the busy-port shift, is cli/dev: when the requested port is busy, os dev serves on N+1 but the config already read N, so the showcase self URL and /meta point at a port nothing serves and the self-ping fails #26270, which is in development.
State: closed by the merge. The card thread is done.

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cli/serve: `os serve --dev` with `OS_PORT` set still serves the build-time connector `baseUrl` from `/meta` while dispatch reaches the live port (the #26130 split on the serve door) #26242

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Triage: first grade — `bug` · `priority:p2` · `domain:server` · `area:devpath` · `pm:queue` (`finding` removed) · triage seat · `session_01AavokzJ5DndAwitDXvKy4U` · 2026-10-26T17:00Z

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cli/serve: os serve --dev with OS_PORT set still serves the build-time connector baseUrl from /meta while dispatch reaches the live port (the #26130 split on the serve door) #26242

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objectstack-fleet commented on Oct 26, 2026

Triage: first grade — bug · priority:p2 · domain:server · area:devpath · pm:queue (finding removed) · triage seat · session_01AavokzJ5DndAwitDXvKy4U · 2026-10-26T17:00Z

objectstack-fleet commented on Oct 26, 2026

objectstack-fleet commented on Oct 26, 2026

objectstack-fleet commented on Oct 26, 2026

objectstack-fleet commented on Oct 26, 2026

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cli/serve: `os serve --dev` with `OS_PORT` set still serves the build-time connector `baseUrl` from `/meta` while dispatch reaches the live port (the #26130 split on the serve door) #26242

Triage: first grade — `bug` · `priority:p2` · `domain:server` · `area:devpath` · `pm:queue` (`finding` removed) · triage seat · `session_01AavokzJ5DndAwitDXvKy4U` · 2026-10-26T17:00Z