[GaganSD]

Summary

Makes themes a single surface and makes file mutations visible again.

• One theme surface. /theme (and /slate theme) now opens the picker only. The 60-name /slate theme <flavor> <palette> tree and the /slate style alias are gone; arguments are plain invalid usage. Every bundled theme is reachable from the picker, and saved names like catppuccin-latte-mauve keep working.
• Four official flavors, 15 palettes each. Latte, Frappé, Macchiato, and Mocha from catppuccin.com/palette, grouped into Light (Latte, Frappé) and Dark (Macchiato, Mocha). Palettes are generated from one registry (npm run themes), 63 theme files total; Mocha keeps legacy Quiet as its 16th row.
• Legibility fixes. Selected picker rows paint body text instead of the accent (Latte accent-on-selection was ~1.45:1). Effort ramps are retargeted for light flavors so every stop stays monotonic instead of reversing near the border color.
• Diffs are no longer hidden. edit/write results keep their syntax-highlighted diff while collapsed (16 rows, split view for edits at 100+ columns, ctrl+o for the full diff) instead of collapsing to a +N -M counter. Diff blocks stay out of grouped tool lists so the split layout keeps its width. The non-existent apply_patch tool name is dropped.

Testing

• npm test: 628 unit tests
• npm run test:integration: 90 tests
• npm run typecheck, npm run lint, npm run build (clean-consumer registration)
• pack:check: 140 files
• Manual: /reload, /theme picker navigation/save/cancel, collapsed and expanded diffs

[greptile-apps]

Confidence Score: 4/5

[Medium impact] The changes affect theme selection and tool-result displays within Pi Slate.

The PR appears safe to merge, with a non-blocking changelog correction.

Findings

1.  Past releases claim new behavior ▶

Summary

Adds a live-preview theme picker and expands Catppuccin support to four flavors.

• One theme picker previews choices and saves the selected theme.
• Catppuccin themes now cover four flavors and their full palette sets.
• Collapsed file edits show diff rows instead of only a change count.

Acknowledgments: GaganSD explicitly removes theme arguments and /slate style, drops the nonexistent apply_patch name, and keeps diff blocks outside groups. GaganSD documents Frappé's Light grouping as intentional and the appearance-following pause after cancellation as a known Pi 1.4 limitation.

Diagram

%%{init: {'theme': 'neutral'}}%%
flowchart LR
  A["/theme or /slate theme"] --> B["Theme picker"]
  B --> C["Preview theme instance"]
  C --> B
  B --> D["Enter: save theme name"]
  B --> E["Escape: restore original theme"]

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_{Reviews (1) · Last reviewed commit: "fix(pi-slate): show edit and write diffs..." · Reviewed by Greptile}