[jdx]

Summary

• make the task cache store interface asynchronous for network-backed implementations
• stream remote artifact uploads from disk and downloads into temporary files
• publish artifacts before manifests and validate protocol keys, headers, and media types

Tests

• cargo test task_cache_store::tests
• cargo clippy --workspace --all-features --all-targets -- -D warnings
• mise run test:e2e e2e/tasks/test_task_artifact_cache_concurrency e2e/tasks/test_task_artifact_cache_no_outputs e2e/tasks/test_task_artifact_cache_resilience

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

---

Note

Medium Risk
Touches core task cache restore/store paths and adds a large network/CAS layer; failures are mostly softened with warnings, but bad remote data or partial failures could still affect cache hits and artifact integrity checks.

Overview
Adds an async TaskCacheStore and wires task execution to await cache get, restore, store, and current-output paths.

Remote HTTP backend implements the v1 cache protocol: action results and content-addressed blobs (action bytes, canonical client metadata, directory trees, file chunks). Artifact uploads stream from disk; downloads stream into temp files before reassembly into a local tar.zst for restore. The composite store still promotes remote hits locally and mirrors writes, with lookup failures degrading to local-only.

Cache keys now hash canonical JSON key material; commits pass the serialized action bytes so remote lookups are keyed by (blake3 key, action size). Manifest/types are shared with the store layer; artifact paths use a small wrapper for on-disk vs temporary files.

^{Reviewed by Cursor Bugbot for commit 16390f1. Bugbot is set up for automated code reviews on this repo. Configure here.}

[coderabbitai]

Important

Review skipped

Auto reviews are disabled on base/target branches other than the default branch.

Please check the settings in the CodeRabbit UI or the .coderabbit.yaml file in this repository. To trigger a single review, invoke the @coderabbitai review command.

⚙️ Run configuration

Configuration used: Central YAML (base), Organization UI (inherited)

Review profile: CHILL

Plan: Pro Plus

Run ID: 10950524-4b1f-4a94-be5c-450066ed6a20

You can disable this status message by setting the reviews.review_status to false in the CodeRabbit configuration file.

Use the checkbox below for a quick retry:

• 🔍 Trigger review

---

Thanks for using CodeRabbit! It's free for OSS, and your support helps us grow. If you like it, consider giving us a shout-out.

❤️ Share

• X
• Mastodon
• Reddit
• LinkedIn

_{Comment @coderabbitai help to get the list of available commands.}

[greptile-apps]

Greptile Summary

The PR makes task-cache stores asynchronous and adds streamed, content-addressed HTTP artifact transport.

• Canonicalizes and persists action-key material for remote protocol validation.
• Splits output archives into directory, file, and symlink CAS objects and reconstructs them on download.
• Keeps local-first composite behavior while treating remote failures as cache misses.

Confidence Score: 5/5

The PR appears safe to merge within the scope of this follow-up review.

No blocking failure remains from an eligible prior finding.

Important Files Changed

Filename	Overview
src/task/task_cache.rs	Makes cache reads, restores, and writes asynchronous while carrying canonical action bytes through the store interface.
src/task/task_cache_store.rs	Adds the HTTP CAS protocol, streamed artifact transfer, temporary artifact ownership, and asynchronous local/composite store implementations.
src/task/task_executor.rs	Awaits asynchronous cache lookup, restore, and persistence operations in the task execution flow.
TASK_CACHE_PARITY.md	Marks streamed artifact uploads and downloads as implemented.

_{Reviews (12): Last reviewed commit: "fix(task): verify and canonicalize remot..." | Re-trigger Greptile}

[github-actions]

Instruction counts

benchmark	trend	instructions	Δ	wall (min)	Δ
env	▄█▃▁▁▂█▆▇▄	80,074,952 → 80,045,402	-0.04%	17.64 → 17.44ms	-1.13%
hook-env	█▇▁▄▃▂▅▄▆▇	82,190,914 → 82,215,898	+0.03%	18.34 → 18.44ms	+0.56%
ls	▆▅▁▁▂███▇▅	73,127,800 → 73,084,830	-0.06%	15.71 → 16.91ms	+7.64%
registry	▁▁▂▂▂▄▄▅▂█	49,102,713 → 49,255,363	+0.31%	11.64 → 13.06ms	+12.11%
startup	▄▄▁▃▃▂▂▃▃█	15,784,751 → 15,811,232	+0.17%	9.04 → 9.46ms	+4.65%

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.}

_{16390f17a220 vs e5230aa14775 · measured on the runner, not pushed to the history.}

[cursor]

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

^{❌ Bugbot Autofix is OFF. To automatically fix reported issues with cloud agents, enable autofix in the Cursor dashboard.}

^{Reviewed by Cursor Bugbot for commit 96e6d03. Configure here.}