fix(bench): grid compression cache stores the promise — one call per key

[drewstone]

Grid run #2 failed loud exactly as designed (#246's guard) — and the autopsy of the failure found the real bug in MY code, not the model: retask() compresses 12 holdout tasks via Promise.all, the check-then-set value cache raced, 12 duplicate compression calls fired per κ cell, and one blipped empty → guard threw. (Probe verified flash compresses this prompt fine in isolation.)

The cache now stores the promise: exactly one compression call per unique (γ, κ, prompt) key, shared by every concurrent caller, with one named retry on a degenerate first attempt. Artifact persistence awaits the cached promises.

Bench typecheck ✓. Run #2 relaunched on this code.

[tangletools]

✅ Auto-approved PR — 4107e7f9

Blanket team auto-approval is enabled for this reviewer service.
The full PR reviewer audit still runs separately and will publish findings if it detects issues.

_{tangletools · auto-approval · reason: blanket_auto_approve · 2026-06-10T22:13:37Z}

[drewstone]

Grid run #2 failed loud exactly as designed (#246's guard) — and the autopsy of the failure found the real bug in MY code, not the model: retask() compresses 12 holdout tasks via Promise.all, the check-then-set value cache raced, 12 duplicate compression calls fired per κ cell, and one blipped empty → guard threw. (Probe verified flash compresses this prompt fine in isolation.)

The cache now stores the promise: exactly one compression call per unique (γ, κ, prompt) key, shared by every concurrent caller, with one named retry on a degenerate first attempt. Artifact persistence awaits the cached promises.

Bench typecheck ✓. Run #2 relaunched on this code.

[tangletools]

✅ Auto-approved PR — 4107e7f9

Blanket team auto-approval is enabled for this reviewer service.
The full PR reviewer audit still runs separately and will publish findings if it detects issues.

_{tangletools · auto-approval · reason: blanket_auto_approve · 2026-06-10T22:13:37Z}

[drewstone]

Grid run #2 failed loud exactly as designed (#246's guard) — and the autopsy of the failure found the real bug in MY code, not the model: retask() compresses 12 holdout tasks via Promise.all, the check-then-set value cache raced, 12 duplicate compression calls fired per κ cell, and one blipped empty → guard threw. (Probe verified flash compresses this prompt fine in isolation.)

The cache now stores the promise: exactly one compression call per unique (γ, κ, prompt) key, shared by every concurrent caller, with one named retry on a degenerate first attempt. Artifact persistence awaits the cached promises.

Bench typecheck ✓. Run #2 relaunched on this code.

[tangletools]

✅ Auto-approved PR — 4107e7f9

Blanket team auto-approval is enabled for this reviewer service.
The full PR reviewer audit still runs separately and will publish findings if it detects issues.

_{tangletools · auto-approval · reason: blanket_auto_approve · 2026-06-10T22:13:37Z}

[drewstone]

Grid run #2 failed loud exactly as designed (#246's guard) — and the autopsy of the failure found the real bug in MY code, not the model: retask() compresses 12 holdout tasks via Promise.all, the check-then-set value cache raced, 12 duplicate compression calls fired per κ cell, and one blipped empty → guard threw. (Probe verified flash compresses this prompt fine in isolation.)

The cache now stores the promise: exactly one compression call per unique (γ, κ, prompt) key, shared by every concurrent caller, with one named retry on a degenerate first attempt. Artifact persistence awaits the cached promises.

Bench typecheck ✓. Run #2 relaunched on this code.

[tangletools]

✅ Auto-approved PR — 4107e7f9

Blanket team auto-approval is enabled for this reviewer service.
The full PR reviewer audit still runs separately and will publish findings if it detects issues.

_{tangletools · auto-approval · reason: blanket_auto_approve · 2026-06-10T22:13:37Z}

[drewstone]

Grid run #2 failed loud exactly as designed (#246's guard) — and the autopsy of the failure found the real bug in MY code, not the model: retask() compresses 12 holdout tasks via Promise.all, the check-then-set value cache raced, 12 duplicate compression calls fired per κ cell, and one blipped empty → guard threw. (Probe verified flash compresses this prompt fine in isolation.)

The cache now stores the promise: exactly one compression call per unique (γ, κ, prompt) key, shared by every concurrent caller, with one named retry on a degenerate first attempt. Artifact persistence awaits the cached promises.

Bench typecheck ✓. Run #2 relaunched on this code.

[tangletools]

✅ Auto-approved PR — 4107e7f9

Blanket team auto-approval is enabled for this reviewer service.
The full PR reviewer audit still runs separately and will publish findings if it detects issues.

_{tangletools · auto-approval · reason: blanket_auto_approve · 2026-06-10T22:13:37Z}

[drewstone]

Grid run #2 failed loud exactly as designed (#246's guard) — and the autopsy of the failure found the real bug in MY code, not the model: retask() compresses 12 holdout tasks via Promise.all, the check-then-set value cache raced, 12 duplicate compression calls fired per κ cell, and one blipped empty → guard threw. (Probe verified flash compresses this prompt fine in isolation.)

The cache now stores the promise: exactly one compression call per unique (γ, κ, prompt) key, shared by every concurrent caller, with one named retry on a degenerate first attempt. Artifact persistence awaits the cached promises.

Bench typecheck ✓. Run #2 relaunched on this code.

[tangletools]

✅ Auto-approved PR — 4107e7f9

Blanket team auto-approval is enabled for this reviewer service.
The full PR reviewer audit still runs separately and will publish findings if it detects issues.

_{tangletools · auto-approval · reason: blanket_auto_approve · 2026-06-10T22:13:37Z}

[drewstone]

Grid run #2 failed loud exactly as designed (#246's guard) — and the autopsy of the failure found the real bug in MY code, not the model: retask() compresses 12 holdout tasks via Promise.all, the check-then-set value cache raced, 12 duplicate compression calls fired per κ cell, and one blipped empty → guard threw. (Probe verified flash compresses this prompt fine in isolation.)

The cache now stores the promise: exactly one compression call per unique (γ, κ, prompt) key, shared by every concurrent caller, with one named retry on a degenerate first attempt. Artifact persistence awaits the cached promises.

Bench typecheck ✓. Run #2 relaunched on this code.

[tangletools]

✅ Auto-approved PR — 4107e7f9

Blanket team auto-approval is enabled for this reviewer service.
The full PR reviewer audit still runs separately and will publish findings if it detects issues.

_{tangletools · auto-approval · reason: blanket_auto_approve · 2026-06-10T22:13:37Z}

[drewstone]

Grid run #2 failed loud exactly as designed (#246's guard) — and the autopsy of the failure found the real bug in MY code, not the model: retask() compresses 12 holdout tasks via Promise.all, the check-then-set value cache raced, 12 duplicate compression calls fired per κ cell, and one blipped empty → guard threw. (Probe verified flash compresses this prompt fine in isolation.)

The cache now stores the promise: exactly one compression call per unique (γ, κ, prompt) key, shared by every concurrent caller, with one named retry on a degenerate first attempt. Artifact persistence awaits the cached promises.

Bench typecheck ✓. Run #2 relaunched on this code.

[tangletools]

✅ Auto-approved PR — 4107e7f9

Blanket team auto-approval is enabled for this reviewer service.
The full PR reviewer audit still runs separately and will publish findings if it detects issues.

_{tangletools · auto-approval · reason: blanket_auto_approve · 2026-06-10T22:13:37Z}