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edd9e25b59
rateLimitManager.ts (1034 lines, frozen-baselined) is the stateful rate-limiter
(Bottleneck limiters, watchdog timers, learned-limits Map). Extract the pure,
ZERO-IMPORT header-parsing block verbatim into a self-contained leaf, leaving
all stateful machinery in the host:
- rateLimitManager/headers.ts (94) STANDARD_HEADERS, ANTHROPIC_HEADERS,
parseResetTime, toPlainHeaders
Host rateLimitManager.ts: 1034 -> 945. The four items are pure (no limiter
state, no external deps), so the leaf has ZERO imports — it cannot import the
host (check:cycles clean). The host imports all four back (used by
updateFromHeaders). They were module-internal, so the public API is unchanged
(17 exports). Bodies moved byte-identical.
Behavior-preserving: 21 existing rate-limit consumer tests stay green
(rate-limit-manager 7, limiter-lifecycle 4, queue-timeout-msg 2,
idle-eviction 6, body-lock 2); new
tests/unit/ratelimitmanager-headers-split.test.ts (7 assertions) pins
parseResetTime (durations / bare-number / nullish) + toPlainHeaders + guards
the 17-function public API (with a watchdog-timer teardown hook so the runner
exits cleanly).
Refs #3501.