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* feat(telemetry): measure which lint rules fire, cost, and fail to converge Lint rule changes are currently argued from anecdote. This adds the three measurements needed to argue them from data. `lint_report`, once per `hyperframes lint` or `hyperframes check`: - `code_counts` / `codes` — which rules actually fire, and how often - `rule_group_ms` — milliseconds per rule-source module (core, gsap, media, ...) - `slowest_rule` / `slowest_rule_ms` — slowest single rule as `<group>#<index>` - `rule_count` — how many rules this build ran `lint_rule_streak`, once per finding that survives an edit to its file: - `edits` — how many edits the finding survived - `cleared` — whether it eventually went away The streak event is the one that matters. A lint pass costs about 5ms, so per-rule CPU is not what makes the authoring loop slow; a rule an agent cannot satisfy is, because every failed attempt costs a full edit-and-relint cycle. A single run cannot see that, so `lint_rule_streak` reconstructs it across runs: high `edits` with `cleared: false` is a rule nobody can fix, and the `cleared: true` distribution is the baseline to judge it against. An iteration is counted only when the file's content digest CHANGED and the finding is still there. Re-linting an untouched project is not an attempt, which is what stops `check` (which lints on every invocation) from inflating the numbers. Rule identity is the source module plus an index within it. Naming all 86 rules would make the timings prettier but it is a refactor this measurement does not need: the group locates the file, and the index locates the rule. Version, agent runtime, CI flag, and invocation id are already attached to every event by `trackEvent`, so lint pain can be split by CLI version and by which agent produced it without adding anything here. Privacy: only rule codes, counts, and timings are sent. Streak state lives in ~/.hyperframes/lint-streaks.json alongside config.json (so `rm -rf ~/.hyperframes` is still a full reset) and stores digests only — no file paths, no project names, no composition source. Nothing is written and nothing is emitted when telemetry is off. Entries expire after 14 days and are capped at 500 files. `EventProperties` gains string arrays and numeric maps. `codes` and `code_counts` are inherently a set and a histogram; flattening them into dynamic top-level keys would make them unqueryable. PostHog stores both natively. `trackLintRun` is the single call site shared by `lint` and `check`, and it swallows every error — telemetry must never turn a green lint red. * feat(telemetry): emit per-group rule counts so slowest_rule stays comparable Review catch on #3367: `slowest_rule` is the one positional key in either event. It is `<group>#<index>`, so adding or removing a rule renumbers every later slot in that group and the same string means different rules in two builds. #3366 does exactly that to 34 of 81 surviving slots, and `rule_count` alone says only THAT the ruleset moved, not which groups. `rule_group_counts` carries the per-group sizes alongside it, so a consumer comparing two builds can tell which groups' indices still mean the same thing without anyone having to remember which release dropped rules. `codes`, `code_counts` and `rule_group_ms` are keyed by name and were never affected. Also corrects the rule count in the RULE_GROUPS comment: 86, not ~60, as LINT_RULE_COUNT in the same file computes.