feat(task): harden remote cache requests

[jdx]

Summary

• apply mise's standard retry/backoff policy to transient remote cache GET, PUT, and DELETE errors
• enforce configured connect/read and total artifact download timeouts with redirects disabled
• deduplicate concurrent reads per cache key and fall back to local execution when remote access fails

Tests

• cargo test task_cache_store::tests
• cargo clippy --workspace --all-features --all-targets -- -D warnings
• mise run lint-fix

AI-assisted — Tool: Codex; model: unavailable/unavailable; version: unavailable.

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Note

Medium Risk
Changes remote cache I/O behavior (timeouts, retries, redirect policy) and concurrency around promotion; failures still fall back to local-only misses rather than failing tasks.

Overview
Hardens the experimental remote task cache so flaky or slow networks are less likely to break cache hits.

HTTP client and requests: Remote cache reqwest clients now use mise Settings connect/read timeouts, disable redirects, and route GET/PUT traffic (action results, metadata blobs, artifact blobs) through the shared http::retry_async backoff policy. Large blob downloads are additionally capped by http_download_timeout.

Composite store: Concurrent remote lookups for the same cache key are serialized via a per-key lock, with a second local check after acquiring the lock so only one remote fetch promotes an entry. Remote lookup failures still degrade to a local miss (existing warn-and-continue behavior).

Tracker: TASK_CACHE_PARITY.md marks remote timeouts, retries, deduplication, and offline fallback as complete.

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[greptile-apps]

Greptile Summary

The PR hardens remote task-cache operations against transient network failures and redundant concurrent reads.

• Applies standard retry and backoff behavior to remote cache GET and PUT requests.
• Configures connection, read, and total download timeouts while disabling redirects.
• Adds per-key read serialization and a local-cache double-check before remote retrieval.
• Marks timeout, retry, deduplication, and offline-fallback parity as complete.

Confidence Score: 5/5

The PR appears safe to merge.

No blocking failure remains.

Important Files Changed

Filename	Overview
src/task/task_cache_store.rs	Adds HTTP retries and timeout policies plus per-key remote-read serialization; the existing per-key filesystem lock already coordinates the production read paths across processes.
TASK_CACHE_PARITY.md	Marks remote-cache timeout, retry, request-deduplication, and offline-fallback support as complete.

_{Reviews (12): Last reviewed commit: "feat(task): harden remote cache requests" | Re-trigger Greptile}

[github-actions]

Instruction counts

benchmark	trend	instructions	Δ	wall (min)	Δ
env	▂▄▂▁▁▁▄▃▃█	80,074,952 → 80,187,743	+0.14%	17.64 → 17.71ms	+0.37%
hook-env	▆▅▁▃▂▂▄▃▅█	82,190,914 → 82,306,183	+0.14%	18.34 → 18.35ms	+0.04%
ls	▄▃▁▁▁▅▅▅▄█	73,127,800 → 73,252,897	+0.17%	15.71 → 15.83ms	+0.72%
registry	▁▁▂▂▃▆▆█▂▆	49,102,713 → 49,166,259	+0.13%	11.64 → 12.46ms	+7.02%
startup	▃▃▁▂▂▁▁▂▂█	15,784,751 → 15,850,015	+0.41%	9.04 → 9.27ms	+2.55%

No instruction-count regression above 1%.

_{Only instruction counts gate. Wall clock is shown for context — on identical hardware it moves 4-20% run to run.}

_{Measured by tak — instruction-counted CLI benchmarks, stored in this repository's git notes.}

_{535fdd5d5d7f vs e5230aa14775 · measured on the runner, not pushed to the history.}

[cursor]

Cursor Bugbot has reviewed your changes and found 1 potential issue.

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