Panics · P00: the policy in AGENTS.md and a task list by chapter

AGENTS.md

@@ -47,6 +47,7 @@ Ely GPUI Component. A component library for GPUI, in light and dark.
 - Borders use gpui's fixed-pixel helpers (`border_1` is 1px). Hairlines do not scale.
 - One component, one home. Duplicates point to it.
 - Fail fast. No silent fallbacks. Log state changes with `log`.
+- A handler a component needs is an argument of `new`, so leaving it out fails to compile. A state live data or the outside world can reach, a key gone from a list that changed or a failed load, logs an error naming the owner and draws a visible state, nothing chosen or an error line, and the app runs on. An assert on a caller's argument or on a fact true by construction stays; one that runtime data or input can trip is fixed. Chapters move to this as `tasks/panics.md` ticks them.
 - Files stay at or under 500 lines. Comments are one short line, and rare.
 - A repeating animation (spinner, breath, sweep) holds still under reduced motion instead of shortening, or it would spin at 1 ms a turn. An effect set off by a change (flash, shake, a bar that fades at rest) reads elapsed time through `motion::since_change` rather than restarting an animation id, so what it holds keeps its state: an animation's id passes to every descendant, and a new one rebuilds their focus, drags and hover.
 - `motion::duration()` honors reduced motion. Springs overshoot. gpui hands an easing's value to the whole animator unclamped, so `motion::spring` goes inside the animator, on only what may overshoot (`forms::Switch` springs its thumb's travel, not its colors).

TASKS.md

@@ -187,6 +187,7 @@ Per-component lines live in `tasks/`. Tags there:
 - [x] T50g Rendering · Acceptance: the checklist, item by item
 - [x] T51 Showcase · an apps page fed by a public repo — `tasks/showcase.md`
 - [x] T52 Logo · an isometric mark for the header, favicon and OG image — `tasks/logo.md`
+- [ ] T53 Panics · handlers move into `new`, live states log and show, asserts audited — `tasks/panics.md`
 
 ## T00 detail
 

tasks/panics.md

@@ -0,0 +1,65 @@
+# Panics
+
+Started 2026-10-06. A report counted the crate's panics: handlers left out, keys missing from their lists, outside failures, asserts, `expect`, `unreachable!`. Measured in library code, tests aside: 158 `panic!`, 477 `assert!`, 23 `assert_eq!`/`assert_ne!`, 343 `expect`, 14 `unreachable!`.
+
+Rules, at the owner's word:
+
+- A handler a component needs is an argument of `new`. Leaving it out fails to compile, not at render.
+- A state live data or the outside world can reach (a key gone from a list that changed, a failed load) logs an error naming the owner and draws a visible state: nothing chosen, or an error line in the component's box. The app keeps running.
+- An assert on a caller's argument, or on a fact true by construction, stays, as std's do. One that runtime data or input can trip is fixed.
+
+Each item reads every site in its folders, fixes what the rules name, updates callers in the gallery, docs examples and tests, passes `scripts/check.sh`, and passes a codex review (`gpt-6.1-sol`, effort `high`) in a herdr split, five rounds at most. Then it commits and pushes.
+
+## Items
+
+- [x] P00 Policy in AGENTS.md
+- [ ] P01 Primitives — `src/primitives`, `src/lib.rs`, `src/assets.rs`
+- [ ] P02 Typography — `src/typography`
+- [ ] P03 Layout — `src/layout`
+- [ ] P04 Window & Shell — `src/shell`
+- [ ] P05 Buttons & Actions — `src/buttons`
+- [ ] P06 Forms — `src/forms`
+- [ ] P07 Navigation — `src/navigation`
+- [ ] P08 Menus — `src/menus`
+- [ ] P09 Overlays — `src/overlays`
+- [ ] P10 Feedback — `src/feedback`
+- [ ] P11 Loading & Motion — `src/motion`
+- [ ] P12 Data Display — `src/data_display`
+- [ ] P13 Lists & Trees — `src/lists`
+- [ ] P14 Tables — `src/tables`
+- [ ] P15 Charts — `src/charts`
+- [ ] P16 Finance — `src/finance`
+- [ ] P17 Code Editor — `src/editor`
+- [ ] P18 Terminal — `src/terminal`
+- [ ] P19 Git — `src/git`
+- [ ] P20 Debug — `src/debug`
+- [ ] P21 Documents — `src/documents`
+- [ ] P22 Collaboration — `src/collab`
+- [ ] P23 AI Chat — `src/chat`
+- [ ] P24 Agent — `src/agent`
+- [ ] P25 Generative — `src/generative`
+- [ ] P26 Media — `src/media`
+- [ ] P27 Files — `src/files`
+- [ ] P28 Messaging — `src/messaging`
+- [ ] P29 Mail — `src/mail`
+- [ ] P30 Calendar — `src/calendar`
+- [ ] P31 Project — `src/project`
+- [ ] P32 Canvas & Design — `src/canvas`
+- [ ] P33 DB & Dev Tools — `src/devtools`
+- [ ] P34 Dashboard — `src/dashboard`
+- [ ] P35 Settings — `src/settings`
+- [ ] P36 Account — `src/account`
+- [ ] P37 Onboarding — `src/onboarding`
+- [ ] P38 Interaction — `src/interaction`
+- [ ] P39 Theme — `src/theme`
+- [ ] P40 i18n & a11y — `src/i18n`
+- [ ] P41 Maps — `src/maps`
+- [ ] P42 Misc — `src/misc`
+- [ ] P43 Library Tooling — `src/tooling`
+- [ ] P44 Rendering — `src/rendering`
+- [ ] P45 Recount, acceptance table
+
+## Log
+
+One line per item: what changed, what stayed and why, review rounds.
+- P00: AGENTS.md holds the three rules; this list follows the PRD's chapters. Review: 2 rounds (round 1 found the runtime clause missing).