[shunkakinoki]

Summary

• The first screenshot copy after the agent idles took about 1.2s. Warm copies took about 0.18s. macOS finishes writing each capture within about 7ms, so the delay is osascript loading the AppleScript runtime inside clipboard-copy-image.
• Add pasteboard-png, a small Objective-C helper built with runCommandCC. It writes the PNG to NSPasteboard in about 10ms when warm and 0.29s on its first run.
• The launchd agent passes it through CLIPBOARD_COPY_IMAGE. copy-latest.sh uses that variable and falls back to ~/.local/scripts/clipboard-copy-image when it is not set. Linux is unchanged.

Validation

• shellspec spec/screenshot_clipboard_copy_latest_spec.sh: 7 examples, 0 failures (one new test for the override)
• The helper builds with nix, and darwinConfigurations.galactica evaluates the agent env with the helper path
• nixfmt --check and shellcheck are clean
• Not verified end to end with make switch yet

🤖 Generated with Claude Code

---

Summary by cubic

Fixes slow first screenshot copy after the agent idles on macOS. The old osascript-based copier reloaded the AppleScript runtime (~1.2s); the new native helper writes directly to NSPasteboard in milliseconds.

• Adds pasteboard-png, a small Objective-C helper built with runCommandCC, that writes PNG data to the general pasteboard.
• The launchd agent sets CLIPBOARD_COPY_IMAGE to the helper; copy-latest.sh respects that variable and falls back to the old script when unset.
• Linux behavior is unchanged.

^{Written for commit cdcc089. Summary will update on new commits.}

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[coderabbitai]

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Commits

Reviewing files that changed from the base of the PR and between 7ae47e1 and cdcc089.

Files selected for processing: 4

• home-manager/services/screenshot-clipboard/copy-latest.sh
• home-manager/services/screenshot-clipboard/default.nix
• home-manager/services/screenshot-clipboard/pasteboard-png.m
• spec/screenshot_clipboard_copy_latest_spec.sh

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[cubic-dev-ai]

All reported issues were addressed across 4 files

<sub>Reply with feedback, questions, or to request a fix.

View guided diff | Turn on auto-fix | Re-trigger cubic</sub>

[pullfrog]

✅ No new issues found.

Reviewed changes — Reviewed PR #3232 "fix(screenshot-clipboard): copy via native pasteboard helper" against main at cdcc0894, one commit, 4 files changed.

• copy-latest.sh:6 — CLIPBOARD_COPY_IMAGE now falls back to ${CLIPBOARD_COPY_IMAGE:-...} so the launchd-set env var overrides the legacy script path while preserving backward compatibility when unset.
• default.nix:9-12 — Adds a pasteboardPng derivation via runCommandCC compiling pasteboard-png.m with -fobjc-arc -O2 -framework AppKit; sets CLIPBOARD_COPY_IMAGE to the helper's bin path in the launchd agent's EnvironmentVariables.
• pasteboard-png.m:1-22 — New Objective-C helper that reads a PNG file and writes it directly to NSPasteboard (general pasteboard), replacing the ~1.2s osascript AppleScript runtime load with ~10ms warm / ~0.29s cold.
• spec/screenshot_clipboard_copy_latest_spec.sh:60-91 — New test verifying CLIPBOARD_COPY_IMAGE override is respected by copy-latest.sh.

No behavioral issues found. The macOS fast path is gated behind the launchd env var; Linux (watch.sh) is unchanged and continues using the legacy script with wl-copy/xclip. Objective-C error handling (argc, nil data, pasteboard rejection) and shell set -euo pipefail are both correct.

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[linear-code]

SHUN-33083