mcpx exec: ERR_NO_TYPESCRIPT under Alpine's nodejs (musl) build

Finding (from #1987 tier-2 container work, task 3283, 2026-10-30)

mcpx exec under Alpine's nodejs build fails immediately:

$ docker run --rm mcpx-tier2-node exec 'console.log("hi")'
node:internal/util:237
    throw new ERR_NO_TYPESCRIPT();
    ^

Repro: static mcpx (CGO_ENABLED=0) copied into alpine:3.21 with apk add nodejs, MCPX_SCRIPT_RUNTIME=node. The same exec smoke passes in the same alpine image with bun's musl build, and in gcr.io/distroless/cc with deno — so the daemon, the static binary and the exec plumbing are fine; specifically mcpx's node invocation (TypeScript handling — node is asked to strip/run TS in a mode Alpine's node build does not provide) is what breaks.

Why it matters

Alpine + apk add nodejs is the lightest documented way to give a minimal image an exec surface (#1987 tier 2). Today that combination is broken at the first script, with a raw node stack instead of an mcpx-level diagnosis.

Acceptance

mcpx exec works under Alpine's nodejs (musl) build, OR mcpx detects the unsupported node mode up front and fails with its own actionable message (which runtime/mode is missing, what to use instead).
A tier-2 CI leg alpine-node-exec is added to pkgs/mcpx/scripts/tier2-containers.sh + the mcpx tier-2 containers workflow asserting it (the leg is deliberately absent today; see docs/container.md §4).

Intake review

Fleet monitor intake pass (2026-10-30 run). Labels normalised this pass: status/needs-triage, effort/s, meta/enriched (kind/bug, priority/normal, app/mcpx were already present). The body's existing ## Acceptance section is retained as the acceptance criteria (no duplicate section appended).

Still live: no merged PR since filing touches mcpx's node invocation / TypeScript handling; the failure is cleanly isolated by the filer's own controls (same image + bun musl build passes; distroless + deno passes), so this is a node-mode detection problem, not a daemon or exec-plumbing problem.

Notes / risks: the acceptance deliberately allows two outcomes — make it work, or detect-and-diagnose up front. The detect path is the safer first slice: an mcpx-level error naming the missing node mode beats a raw ERR_NO_TYPESCRIPT stack for every minimal-image user, and it unblocks the tier-2 leg either way.

Suggested approach: probe the node's type-stripping capability once at runtime selection (cache the verdict with the runtime record), fail with the actionable message when absent, and add the alpine-node-exec tier-2 leg asserting whichever behaviour lands.

agent-note:v1
state: triaged (coverage pass)
Coverage pass 2026-11-03: reviewed in the fleet-wide per-issue pass (drift / overlap / already-handled / stale / blockers / ordering). Verdict: still live; queued in repo-health-code-pilot as triage at priority 40 (priority/normal). If this is already handled at current main, the triage closes it with evidence; if it needs splitting, the triage files the split.
Found via: coverage pass 2026-11-03

🤖 Agent note · parked

Agent: queue worker (repo-worker-code), lane code-b
Session / ID: task 8649
Found via: queue claim (resume, attempt 12/12)
Task: task 8649 for issue mcpx exec: ERR_NO_TYPESCRIPT under Alpine's nodejs (musl) build #2699 (small_fix) — revalidated fresh 2026-11-04: PR fix(mcpx): diagnose unsupported Node TypeScript mode #5205 still OPEN and Drew-authored; the recorded hard stop is unchanged
Expectation: task parked 30 min; resume only if Drew releases ownership or PR fix(mcpx): diagnose unsupported Node TypeScript mode #5205 closes/merges, then revalidate issue, PR, reviews, and checks fresh. Do not touch PR fix(mcpx): diagnose unsupported Node TypeScript mode #5205, its branch, or its worktree.
Links: issue mcpx exec: ERR_NO_TYPESCRIPT under Alpine's nodejs (musl) build #2699, PR fix(mcpx): diagnose unsupported Node TypeScript mode #5205

🤖 Agent note · handed off

Agent: queue worker (repo-worker-code), lane code-j
Session / ID: task 8649
Found via: queue claim
Task: fix for issue mcpx exec: ERR_NO_TYPESCRIPT under Alpine's nodejs (musl) build #2699 handed off to the opencode execution lane per task 8649 lane assignment
Expectation: claimant launches the bound opencode session; that session drives task 8649 to its terminal state
Links: n/a

🤖 Agent note · handed off

Agent: queue worker (repo-worker-code), lane code-d
Session / ID: task 8649
Found via: queue claim
Task: task 8649 for issue mcpx exec: ERR_NO_TYPESCRIPT under Alpine's nodejs (musl) build #2699 (small_fix) — execution lane assigned opencode (lane-assignment row 1569)
Expectation: the laptop claimant launches the bound opencode session, which drives task 8649 to its terminal state
Links: issue mcpx exec: ERR_NO_TYPESCRIPT under Alpine's nodejs (musl) build #2699

🤖 Agent note · handed off

Agent: queue worker (repo-worker-code), lane code-q
Session / ID: task 8649
Found via: queue claim
Task: Fix for issue mcpx exec: ERR_NO_TYPESCRIPT under Alpine's nodejs (musl) build #2699 (mcpx exec under Alpine nodejs) — execution-lane assignment returned opencode; handing task 8649 to the opencode claimant. Gate preserved from the prior checkpoint and re-verified this shift: PR fix(mcpx): diagnose unsupported Node TypeScript mode #5205 is OPEN and Drew-owned (author dezren39) — do not touch it or build a competing PR; the bound session resumes only through that canonical PR.
Expectation: effort s; done = PR fix(mcpx): diagnose unsupported Node TypeScript mode #5205 path lands the fix for issue mcpx exec: ERR_NO_TYPESCRIPT under Alpine's nodejs (musl) build #2699, or task 8649 is parked again while PR fix(mcpx): diagnose unsupported Node TypeScript mode #5205 remains Drew-owned.
Links: task 8649 (repo-health-code-pilot queue); PR fix(mcpx): diagnose unsupported Node TypeScript mode #5205 fix(mcpx): diagnose unsupported Node TypeScript mode #5205 ; branch queue/8649-2699-node-ts-capability

🤖 Agent note · handed off

Agent: queue worker (repo-worker-code), lane code-k
Session / ID: task 8649, repo-queue-worker-shift-k 2026-11-04 12:33 CST
Found via: queue claim
Task: task 8649 (small_fix, issue mcpx exec: ERR_NO_TYPESCRIPT under Alpine's nodejs (musl) build #2699 mcpx Alpine node TypeScript) assigned to the opencode execution lane per §1b; handing off to the laptop opencode-claimant — no direct work this shift.
Hard stop re-verified fresh: canonical PR fix(mcpx): diagnose unsupported Node TypeScript mode #5205 is still OPEN (author dezren39 / Drew). Do not touch or compete with PR fix(mcpx): diagnose unsupported Node TypeScript mode #5205; any resume runs only via the canonical PR. Issue mcpx exec: ERR_NO_TYPESCRIPT under Alpine's nodejs (musl) build #2699 OPEN, no hard-stop labels on the issue itself.
Expectation: claimant's bound opencode session drives task 8649, respecting the PR fix(mcpx): diagnose unsupported Node TypeScript mode #5205 hard stop.

🤖 Agent note · handed off

Agent: fleet monitor
Session / ID: task 8649 (repo-fleet-monitor run 2026-11-05T15:45:48Z)
Found via: monitor reconciliation (Duty 1 claim/label divergence repair)
Task: Claim evaporated: task 8649 is queued and unclaimed in repo-health-code-pilot, but this issue still carried claimed labels. Labels reset to the truth (queue/queued + status/needs-triage). Checkpoint stage at evaporation: handed_off.
Expectation: The next lane claim picks task 8649 up from the queued state and posts a fresh pickup note.

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mcpx exec: ERR_NO_TYPESCRIPT under Alpine's nodejs (musl) build #2699

Finding (from #1987 tier-2 container work, task 3283, 2026-10-30)

Why it matters

Acceptance

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mcpx exec: ERR_NO_TYPESCRIPT under Alpine's nodejs (musl) build #2699

Description

Finding (from #1987 tier-2 container work, task 3283, 2026-10-30)

Why it matters

Acceptance

Activity

dezren39 commented on Oct 30, 2026

Intake review

developing-today commented on Nov 3, 2026

43 remaining items

dezren39 commented on Nov 4, 2026

dezren39 commented on Nov 4, 2026

dezren39 commented on Nov 4, 2026

dezren39 commented on Nov 4, 2026

dezren39 commented on Nov 4, 2026

dezren39 commented on Nov 5, 2026

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