VERIFICATION

Must-Have Checks

#	ID	Truth/Condition	Status	Evidence
1	MH-01	update_source_state! rescues broadcast errors separately from DB errors	PASS	source.update!(attrs) bare at line 91; broadcast wrapped in begin/rescue at lines 92-98 of fetch_runner.rb
2	MH-02	DB failures propagate as exceptions from update_source_state!	PASS	source.update!(attrs) is NOT inside any rescue block
3	MH-03	FetchRunner#run has ensure block that resets fetch_status from 'fetching' to 'failed'	PASS	Lines 72-78: ensure block with source.reload; source.update!(fetch_status: "failed") if source.fetch_status == "fetching"
4	MH-04	FollowUpHandler#call rescues StandardError per-item so failures don't block mark_complete!	PASS	Lines 19-25: begin/rescue StandardError wraps each enqueuer_class.enqueue(...) call
5	MH-05	Two separate rescue blocks in fetch_runner.rb (broadcast + run)	PASS	grep confirms 4 rescue lines: NotAcquiredError, StandardError (run), StandardError (ensure fallback), StandardError (broadcast)
6	MH-06	Test: DB update failure in update_source_state! raises	PASS	fetch_runner_test.rb line 333: stubs update! to raise ActiveRecord::ConnectionNotEstablished, asserts raise
7	MH-07	Test: broadcast failure is swallowed, source still updates	PASS	fetch_runner_test.rb line 357: stubs broadcast_source to raise, asserts source reaches "idle"
8	MH-08	Test: ensure resets fetch_status from fetching on unexpected error	PASS	fetch_runner_test.rb line 376: failing fetcher + assert "failed" status after exception
9	MH-09	Test: follow_up_handler partial failure doesn't prevent other items	PASS	follow_up_handler_test.rb line 14: call_count == 2 after first enqueue fails
10	MH-10	Test: follow_up_handler complete failure doesn't raise	PASS	follow_up_handler_test.rb line 57: assert_nothing_raised with always-failing enqueuer
11	MH-11	Fixed-interval path uses adjusted_interval_with_jitter, not exact minutes	PASS	Lines 31-33 of adaptive_interval.rb: fixed_seconds = fixed_minutes * 60.0; attributes[:next_fetch_at] = Time.current + adjusted_interval_with_jitter(fixed_seconds)
12	MH-12	Fixed-interval sources get ±jitter_percent variation on next_fetch_at (default 10%)	PASS	adjusted_interval_with_jitter calls jitter_offset which reads jitter_percent_value (default 0.1)
13	MH-13	jitter_proc override still works for fixed-interval path	PASS	feed_fetcher_adaptive_interval_test.rb line 225: proc override test passes (9/9 tests)
14	MH-14	Existing adaptive interval tests still pass unchanged	PASS	9 adaptive interval tests pass; existing tests use jitter: ->(_) { 0 } override
15	MH-15	FetchingSettings has scheduler_batch_size attr_accessor with default 25	PASS	fetching_settings.rb lines 12, 26: attr_accessor :scheduler_batch_size; @scheduler_batch_size = 25
16	MH-16	FetchingSettings has stale_timeout_minutes attr_accessor with default 5	PASS	fetching_settings.rb lines 13, 27: attr_accessor :stale_timeout_minutes; @stale_timeout_minutes = 5
17	MH-17	Scheduler.run reads batch size from config instead of DEFAULT_BATCH_SIZE	PASS	scheduler.rb line 12: def self.run(limit: SourceMonitor.config.fetching.scheduler_batch_size, now: Time.current)
18	MH-18	Scheduler uses stale_timeout from config instead of STALE_QUEUE_TIMEOUT constant	PASS	scheduler.rb lines 46-47: def stale_timeout; SourceMonitor.config.fetching.stale_timeout_minutes.minutes; end used at lines 23 and 79
19	MH-19	StalledFetchReconciler.default_stale_after reads from config instead of Scheduler constant	PASS	stalled_fetch_reconciler.rb line 46: SourceMonitor.config.fetching.stale_timeout_minutes.minutes with rescue NoMethodError fallback
20	MH-20	Host apps can override via SourceMonitor.configure { |c| c.fetching.scheduler_batch_size = 50 }	PASS	Confirmed by scheduler_test.rb line 268: sets batch_size=2, verifies only 2 enqueued from 5 sources
21	MH-21	All existing scheduler tests pass, new tests verify configurable defaults	PASS	16 scheduler tests pass (4 new: default_batch_size, default_stale, configurable_batch, configurable_stale)
22	MH-22	Configuration has maintenance_queue_name attr_accessor defaulting to 'source_monitor_maintenance'	PASS	configuration.rb lines 25, 42: attr_accessor :maintenance_queue_name; @maintenance_queue_name = "#{DEFAULT_QUEUE_NAMESPACE}_maintenance"
23	MH-23	Configuration has maintenance_queue_concurrency attr_accessor defaulting to 1	PASS	configuration.rb lines 28, 45: @maintenance_queue_concurrency = 1
24	MH-24	queue_name_for(:maintenance) returns configured maintenance queue name with prefix	PASS	configuration.rb lines 71-72: when :maintenance; maintenance_queue_name
25	MH-25	concurrency_for(:maintenance) returns configured maintenance queue concurrency	PASS	configuration.rb lines 93-94: when :maintenance; maintenance_queue_concurrency
26	MH-26	FetchFeedJob and ScheduleFetchesJob remain on :fetch queue	PASS	grep source_monitor_queue :fetch returns only these 2 files
27	MH-27	ScrapeItemJob remains on :scrape queue	PASS	scrape_item_job.rb line 5: source_monitor_queue :scrape
28	MH-28	7 jobs use :maintenance queue (SourceHealthCheckJob, ImportSessionHealthCheckJob, ImportOpmlJob, LogCleanupJob, ItemCleanupJob, FaviconFetchJob, DownloadContentImagesJob)	PASS	All 7 job files show source_monitor_queue :maintenance
29	MH-29	Example solid_queue.yml includes all 3 SourceMonitor queues	PASS	examples/advanced_host/files/config/solid_queue.yml contains source_monitor_fetch, source_monitor_scrape, source_monitor_maintenance
30	MH-30	All existing job tests pass, new tests verify queue assignments	PASS	configuration_test.rb: 10 new queue separation tests all pass (95/95 total)

Artifact Checks

#	ID	Artifact	Exists	Contains	Status
1	ART-01	lib/source_monitor/fetching/fetch_runner.rb	YES	ensure block + split rescue in update_source_state!	PASS
2	ART-02	lib/source_monitor/fetching/completion/follow_up_handler.rb	YES	per-item begin/rescue StandardError	PASS
3	ART-03	test/lib/source_monitor/fetching/completion/follow_up_handler_test.rb	YES	2 new tests for error resilience	PASS
4	ART-04	lib/source_monitor/fetching/feed_fetcher/adaptive_interval.rb	YES	fixed-interval else-branch calls adjusted_interval_with_jitter	PASS
5	ART-05	test/lib/source_monitor/fetching/feed_fetcher_adaptive_interval_test.rb	YES	3 new jitter tests (9 total)	PASS
6	ART-06	lib/source_monitor/configuration/fetching_settings.rb	YES	scheduler_batch_size=25, stale_timeout_minutes=5 in reset!	PASS
7	ART-07	lib/source_monitor/scheduler.rb	YES	self.run reads config, stale_timeout method, legacy constants remain as fallbacks	PASS
8	ART-08	lib/source_monitor/fetching/stalled_fetch_reconciler.rb	YES	default_stale_after reads config with NoMethodError rescue fallback	PASS
9	ART-09	lib/source_monitor/configuration.rb	YES	maintenance_queue_name, maintenance_queue_concurrency, queue_name_for(:maintenance), concurrency_for(:maintenance)	PASS
10	ART-10	examples/advanced_host/files/config/solid_queue.yml	YES	3-queue layout with comments explaining roles	PASS

Anti-Pattern Scan

#	ID	Pattern	Status	Evidence
1	AP-01	Swallowing DB errors in broad rescue in update_source_state!	PASS (fixed)	source.update!(attrs) at line 91 is bare — no rescue wrapping it
2	AP-02	Missing ensure block leaving source stuck in 'fetching'	PASS (fixed)	ensure block at lines 72-78 of fetch_runner.rb
3	AP-03	FollowUpHandler exceptions propagating past mark_complete!	PASS (fixed)	per-item rescue at lines 19-25 of follow_up_handler.rb
4	AP-04	Fixed-interval path uses exact minutes without jitter (thundering herd)	PASS (fixed)	adjusted_interval_with_jitter(fixed_seconds) at line 33 of adaptive_interval.rb
5	AP-05	Hardcoded DEFAULT_BATCH_SIZE=100 in Scheduler.run	PASS (fixed)	Scheduler.run default param now reads config; constant retained as legacy fallback only
6	AP-06	STALE_QUEUE_TIMEOUT constant used directly in StalledFetchReconciler	PASS (fixed)	default_stale_after now reads config; constant only remains as legacy in scheduler.rb
7	AP-07	Stale constant reference: Scheduler::STALE_QUEUE_TIMEOUT in production code	WARN	schedule_fetches_job.rb line 26 still uses Scheduler::DEFAULT_BATCH_SIZE as fallback for explicit calls with no options. When ScheduleFetchesJob runs with no args (normal recurring schedule), it passes 100 to Scheduler.run instead of the configured 25. The plan's must_have targets only Scheduler.run's default param — not ScheduleFetchesJob. Legacy constant still present but marked as "legacy fallback".
8	AP-08	Test isolation: follow_up_handler_test.rb fails when run standalone	FAIL	Missing require "source_monitor/fetching/completion/follow_up_handler" — both tests error with NameError: uninitialized constant FollowUpHandler when run in isolation. Full suite passes (1211/0) because the class loads from another test.
9	AP-09	No :nocov: guard on unreachable rescue in ensure block	PASS	ensure rescue at line 76 correctly annotated with # :nocov:
10	AP-10	Maintenance queue concurrency inconsistency between config default and example YAML	PASS	Both config default and YAML use concurrency: 1; ENV var override supported in YAML

Requirement Mapping

#	ID	Requirement	Plan Ref	Evidence	Status
1	REQ-01	REQ-FT-01/02/03: Error handling safety net	PLAN-01 must_haves 1-6	All 3 changes in fetch_runner.rb + follow_up_handler.rb; 5 new tests	PASS
2	REQ-02	REQ-FT-04: Fixed-interval jitter	PLAN-02 must_haves 1-4	adaptive_interval.rb else-branch wired; 3 new tests pass	PASS
3	REQ-03	REQ-FT-06/07: Configurable batch size + stale timeout	PLAN-03 must_haves 1-7	FetchingSettings new attrs; Scheduler + StalledFetchReconciler wired; 4 new tests	PASS
4	REQ-04	REQ-FT-09/10: Maintenance queue separation	PLAN-04 must_haves 1-8	7 jobs moved to :maintenance; config updated; example YAML updated; 10 new tests	PASS
5	REQ-05	ScheduleFetchesJob uses configured batch size (implied)	Not in PLAN-03 must_haves	ScheduleFetchesJob still uses DEFAULT_BATCH_SIZE (100) as fallback — out of plan scope but creates semantic gap	WARN

Convention Compliance

#	ID	Convention	File	Status	Detail
1	CON-01	RuboCop zero offenses	All changed files	PASS	bin/rubocop exits 0 across 369 files
2	CON-02	Brakeman zero warnings	All files	PASS	0 security warnings, 1 pre-existing ignored warning
3	CON-03	Minitest (no RSpec/FactoryBot)	All test files	PASS	All new tests use ActiveSupport::TestCase, create_source! factory
4	CON-04	Configuration reset! pattern in FetchingSettings	fetching_settings.rb	PASS	New attrs initialized in reset! following existing pattern
5	CON-05	frozen_string_literal header	All new/changed files	PASS	All files include # frozen_string_literal: true
6	CON-06	Test file requires implementation file	follow_up_handler_test.rb	FAIL	Missing require "source_monitor/fetching/completion/follow_up_handler" — standalone isolation broken
7	CON-07	:nocov: annotation on unreachable rescue paths	fetch_runner.rb line 76	PASS	Defensive ensure rescue annotated # :nocov:
8	CON-08	Shallow jobs (jobs delegate to services, no business logic)	All job files	PASS	Jobs only call source_monitor_queue and delegate to Scheduler/FetchRunner

Summary

Tier: deep | Result: PASS | Passed: 37/38 | Failed: [CON-06 / AP-08 — follow_up_handler_test.rb missing require for standalone isolation]

Full test suite: 1211 runs, 3755 assertions, 0 failures, 0 errors, 0 skips RuboCop: 0 offenses | Brakeman: 0 warnings

One non-blocking issue found: test/lib/source_monitor/fetching/completion/follow_up_handler_test.rb is missing a require for its subject class. Both tests in the file fail with NameError when run in isolation (bin/rails test test/lib/source_monitor/fetching/completion/follow_up_handler_test.rb). They pass in the full suite because fetch_runner.rb already requires the class transitively. All must-haves from all 4 plans are satisfied. Core behavior is verified and correct.

One architectural note (WARN, not a failure): ScheduleFetchesJob#extract_limit falls back to Scheduler::DEFAULT_BATCH_SIZE (100) when called with no explicit options argument. In normal recurring schedule operation, this means the job sends limit=100 to Scheduler.run, bypassing the config.fetching.scheduler_batch_size = 25 default. This was not in scope for PLAN-03 but creates a semantic gap between the configured default and the job-driven default.