keyhunter/.planning/phases/09-osint-infrastructure/09-02-SUMMARY.md

phase, plan, subsystem, tags, requires, provides, affects, tech-stack, key-files, decisions, metrics, requirements

phase	plan	subsystem	tags	requires	provides	affects	tech-stack	key-files	decisions	metrics	requirements
09-osint-infrastructure	02	recon	recon rate-limiting stealth infrastructure	golang.org/x/time/rate	pkg/recon.LimiterRegistry pkg/recon.NewLimiterRegistry LimiterRegistry.For LimiterRegistry.Wait		added patterns per-source rate.Limiter map guarded by sync.Mutex idempotent registry lookup (first registration wins) optional stealth jitter (100ms-1s) gated by flag	created modified pkg/recon/limiter.go pkg/recon/limiter_test.go	Jitter range fixed at 100ms + rand[0,900)ms per plan spec (max ~1000ms) First For() call wins; later rate/burst arguments are ignored to preserve token state Added TestJitterDisabled as extra guard (Rule 2 correctness)	completed duration tasks 2026-04-05 ~5 min 1/1	RECON-INFRA-05

Phase 09 Plan 02: LimiterRegistry Summary

Per-source rate limiting foundation using golang.org/x/time/rate with optional stealth jitter, keyed by source name via a mutex-guarded registry.

What Was Built

• pkg/recon/limiter.go — LimiterRegistry type with:
  • NewLimiterRegistry() constructor (empty map)
  • For(name, r, burst) *rate.Limiter — idempotent lookup; creates on first call, returns the same pointer on subsequent calls
  • Wait(ctx, name, r, burst, stealth) error — acquires limiter (via For), blocks on limiter.Wait(ctx), then sleeps a random 100ms–1000ms jitter if stealth==true, respecting ctx cancellation during the sleep
• pkg/recon/limiter_test.go — 5 tests:
  • TestLimiterPerSourceIsolation — different names → distinct *rate.Limiter
  • TestLimiterIdempotent — same name → same pointer
  • TestWaitRespectsContext — pre-cancelled ctx returns error
  • TestJitterRange — stealth=true elapsed ∈ [90ms, 1200ms]
  • TestJitterDisabled — stealth=false elapsed < 50ms

Satisfies

• RECON-INFRA-05 — "each source owns its own limiter — no centralization". Verified via TestLimiterPerSourceIsolation.
• Partial foundation for RECON-INFRA-06 (stealth jitter) — fully wired into the engine in plan 09-03.

Verification

go test -run 'TestLimiter|TestWait|TestJitter' -count=1 -v \
  ./pkg/recon/limiter.go ./pkg/recon/limiter_test.go ./pkg/recon/source.go

Result: 5/5 PASS.

Tests were executed via explicit file list because sibling plans in the same wave (09-03, 09-04) have landed test files (engine_test.go, robots_test.go) whose implementation files are still in flight. This is expected parallel-wave behavior and does not affect the correctness of this plan's code. Once all wave-1 plans merge, go test ./pkg/recon/... will run the full suite.

go vet ./pkg/recon/limiter.go ./pkg/recon/source.go is clean.

Deviations from Plan

Auto-fixed Issues

1. [Rule 2 — Missing coverage] Added TestJitterDisabled

• Found during: Task 1
• Issue: Plan tested jitter upper/lower bounds with stealth on, but did not assert the negative case — a regression that applied jitter even when stealth=false would go undetected.
• Fix: Added TestJitterDisabled asserting elapsed < 50ms when stealth=false.
• Files modified: pkg/recon/limiter_test.go
• Commit: 590fc33

No architectural deviations. No blockers.

Commits

• 590fc33 — feat(09-02): add LimiterRegistry with per-source rate limiters and jitter

Self-Check: PASSED

• FOUND: pkg/recon/limiter.go
• FOUND: pkg/recon/limiter_test.go
• FOUND commit: 590fc33
• All plan tasks (1/1) complete
• All plan success criteria met:
  • LimiterRegistry exported with For and Wait ✓
  • Each source receives its own *rate.Limiter ✓
  • Stealth jitter range 100ms–1s enforced ✓