docs: archive more-patterns change and sync specs

Archive completed change and update pattern-placement spec.
2026-11-08 16:22:44 +01:00
parent ed6c9c81f3
commit 8c2fbbbbc8
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+schema: spec-driven
+created: 2026-11-08
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+# Design
+
+## Context
+
+Pattern module currently has 4 patterns with static offsets. Config maps digits 1-4.
+
+## Goals / Non-Goals
+
+**Goals:**
+- Add 6 patterns with correct offsets.
+- Extend default config digits 5-0.
+
+**Non-Goals:**
+- Pattern editor.
+- Loading from files.
+
+## Decisions
+
+### D1: Pattern storage
+- Add static offset arrays and entries in `patterns[]`.
+
+### D2: Key mapping
+- 5=Beacon, 6=Loaf, 7=Boat, 8=Tub, 9=R-pentomino, 0=Acorn.
+
+### D3: Config enum
+- Add `ACTION_SELECT_BEACON` etc. or refactor? Use new enum values for minimal change.
+
+## Open Questions
+
+None.
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+# Proposal
+
+## Why
+
+The tool currently offers only 4 patterns. Adding a broader set (Beacon, Loaf, Boat, Tub, R-pentomino, Acorn) makes it more useful for exploring Life dynamics.
+
+## What Changes
+
+- Add 6 new built-in patterns.
+- Extend pattern module and count to 10.
+- Add default key bindings 5–0 for the new patterns.
+
+## Capabilities
+
+### New Capabilities
+
+None.
+
+### Modified Capabilities
+
+- `pattern-placement`: additional built-in patterns and their key bindings.
+
+## Impact
+
+- Affected code: `pattern.c/h`, `config.c`, `wlgol.c` (enum/actions if needed).
+- No new dependencies.
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+# Spec Delta
+
+## ADDED Requirements
+
+### Requirement: Additional built-in patterns are available
+The system SHALL provide additional built-in patterns (Beacon, Loaf, Boat, Tub, R-pentomino, Acorn) selectable via keys 5-0.
+
+#### Scenario: Select beacon
+- **WHEN** the user triggers `select:beacon`
+- **THEN** a beacon preview is shown
+
+### Requirement: New patterns support rotation
+The system SHALL support 90-degree rotation for all new patterns.
+
+#### Scenario: Rotate new pattern
+- **WHEN** the user rotates a new pattern preview
+- **THEN** its cells rotate accordingly
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+# Tasks
+
+## 1. Pattern module
+
+- [x] 1.1 Add offset arrays for Beacon, Loaf, Boat, Tub, R-pentomino, Acorn.
+- [x] 1.2 Register new patterns in patterns[] and update pattern_count to 10.
+
+## 2. Config
+
+- [x] 2.1 Add select actions for new patterns and default bindings 5-0.
+- [x] 2.2 Update config defaults and default file content.
+
+## 3. Verification
+
+- [x] 3.1 Build and run ctest.
+- [x] 3.2 Manual test selecting/rotating new patterns.