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Rules extracted from incidents that were only recorded in session memory: - Write the failing test first; regression fixtures built from the real production input, not an approximation. - A test that has never executed is not a gate: no env-flag gating, verify CI is enabled, read the skip count. - Boundaries that swallow things silently: persistence round-trip, serialization, declared dependency ranges vs the lockfile. - Deploy verification means running the feature, not inspecting artifacts. - npm release order: promote to main (fast-forward) before publish. - Never pkill by substring; anchor the pattern or kill by PID. Also removes the 15-second/30-second status-update cadence and its [HH:MM:SS] UPDATE #N format, a relic of early sessions. Stuck detection is kept. Claude-Session: https://claude.ai/code/session_01DEVew52GVgXWWN9Z6Vc5W7
…plugin The .cursor rules were generated copies (config.json describes the generator) that drifted for a year: a status-update rule removed in 2026 still existed in five of them, and every file duplicated content already in CLAUDE.md. Domain knowledge and engineering rules now live in one place: nodots/backgammon-rules, installed as a Claude Code plugin from the nodots-plugins marketplace. Salvaged before deletion: the api's ESM/ts-node migration-consistency checks (now backgammon-api/CLAUDE.md). Dropped deliberately: generic boilerplate (REST verbs, HTTP status codes, "use HTTPS", "avoid memory leaks") and a stale rule saying never to restart the API server, which contradicts the current CLAUDE.md instruction to kill it before starting. Claude-Session: https://claude.ai/code/session_01DEVew52GVgXWWN9Z6Vc5W7
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Extracts rules that until now lived only in session memory into the files agents actually load.
RUN_GNUBG_HINTS=1), verify CI is enabled, read the skip count.mainby fast-forward before publish.Also drops the 15-second/30-second status-update cadence and its
[HH:MM:SS] UPDATE #Nformat, a relic of early sessions. Stuck detection is kept.https://claude.ai/code/session_01DEVew52GVgXWWN9Z6Vc5W7
Second commit on this branch: deletes the
.cursor/rule files. They were generated copies that drifted for a year (the 15-second rule removed in the first commit still existed in five of them, generated 2025-07-05), duplicating content already inCLAUDE.md. The single source is now thebackgammon-rulesplugin — a SessionStart hook for the non-negotiables plusbackgammon-domain/nodots-engineeringskills, installed withclaude plugin install backgammon-rules@nodots-plugins.