cameleer-server/.planning/phases/01-ingestion-pipeline-api-foundation/01-VERIFICATION.md

phase, verified, status, score, re_verification

phase	verified	status	score	re_verification
01-ingestion-pipeline-api-foundation	2026-03-11T12:00:00Z	passed	5/5 must-haves verified	false

Phase 1: Ingestion Pipeline + API Foundation Verification Report

Phase Goal: Agents can POST execution data, diagrams, and metrics to the server, which batch-writes them to ClickHouse with TTL retention and backpressure protection Verified: 2026-03-11 Status: PASSED Re-verification: No — initial verification

Goal Achievement

Observable Truths (from ROADMAP.md Success Criteria)

#	Truth	Status	Evidence
1	An HTTP client can POST a RouteExecution payload to /api/v1/data/executions and receive 202 Accepted, and the data appears in ClickHouse within the flush interval	VERIFIED	ExecutionController returns 202; ExecutionControllerIT.postExecution_dataAppearsInClickHouseAfterFlush uses Awaitility to confirm row in route_executions
2	An HTTP client can POST RouteGraph and metrics payloads to their respective endpoints and receive 202 Accepted	VERIFIED	DiagramController and MetricsController both return 202; DiagramControllerIT.postDiagram_dataAppearsInClickHouseAfterFlush and MetricsControllerIT.postMetrics_dataAppearsInClickHouseAfterFlush confirm ClickHouse persistence
3	When the write buffer is full, the server returns 503 and does not lose already-buffered data	VERIFIED	BackpressureIT.whenBufferFull_returns503WithRetryAfter confirms 503 + Retry-After header; bufferedDataNotLost_afterBackpressure confirms buffered items remain in buffer (diagram flush-to-ClickHouse path separately covered by DiagramControllerIT)
4	Data older than the configured TTL (default 30 days) is automatically removed by ClickHouse	VERIFIED	HealthControllerIT.ttlConfiguredOnRouteExecutions and ttlConfiguredOnAgentMetrics query SHOW CREATE TABLE and assert TTL + toIntervalDay(30) present in schema
5	The health endpoint responds at /api/v1/health, OpenAPI docs are available, protocol version header is validated, and unknown JSON fields are accepted	VERIFIED	HealthControllerIT confirms 200; OpenApiIT confirms OpenAPI JSON + Swagger UI accessible; ProtocolVersionIT confirms 400 without header, 400 on wrong version, passes on version "1"; ForwardCompatIT confirms unknown fields do not cause 400/422

Score: 5/5 truths verified

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Required Artifacts

Plan 01-01 Artifacts

Artifact	Expected	Status	Details
cameleer-server-core/src/main/java/com/cameleer/server/core/ingestion/WriteBuffer.java	Generic bounded write buffer with offer/drain/isFull	VERIFIED	80 lines; ArrayBlockingQueue-backed; implements offer, offerBatch (all-or-nothing), drain, isFull, size, capacity, remainingCapacity
clickhouse/init/01-schema.sql	ClickHouse DDL for all three tables	VERIFIED	Contains CREATE TABLE route_executions, route_diagrams, agent_metrics; correct ENGINE, ORDER BY, PARTITION BY, TTL with toDateTime() cast
docker-compose.yml	Local ClickHouse service	VERIFIED	clickhouse/clickhouse-server:25.3; ports 8123/9000; init volume mount; credentials configured
cameleer-server-core/src/main/java/com/cameleer/server/core/storage/ExecutionRepository.java	Repository interface for execution batch inserts	VERIFIED	Declares void insertBatch(List<RouteExecution> executions)

Plan 01-02 Artifacts

Artifact	Expected	Status	Details
cameleer-server-app/src/main/java/com/cameleer/server/app/controller/ExecutionController.java	POST /api/v1/data/executions endpoint	VERIFIED	79 lines; @PostMapping("/executions"); handles single/array via raw String parsing; returns 202 or 503 + Retry-After
cameleer-server-app/src/main/java/com/cameleer/server/app/storage/ClickHouseExecutionRepository.java	Batch insert to route_executions via JdbcTemplate	VERIFIED	118 lines; @Repository; BatchPreparedStatementSetter; flattens processor tree to parallel arrays
cameleer-server-app/src/main/java/com/cameleer/server/app/ingestion/ClickHouseFlushScheduler.java	Scheduled drain of WriteBuffer into ClickHouse	VERIFIED	160 lines; @Scheduled(fixedDelayString="${ingestion.flush-interval-ms:1000}"); implements SmartLifecycle for shutdown drain
cameleer-server-core/src/main/java/com/cameleer/server/core/ingestion/IngestionService.java	Routes data to appropriate WriteBuffer instances	VERIFIED	115 lines; plain class; acceptExecution, acceptExecutions, acceptDiagram, acceptDiagrams, acceptMetrics; delegates to typed WriteBuffer instances

Plan 01-03 Artifacts

Artifact	Expected	Status	Details
cameleer-server-app/src/main/java/com/cameleer/server/app/interceptor/ProtocolVersionInterceptor.java	Validates X-Cameleer-Protocol-Version:1 header on data endpoints	VERIFIED	47 lines; implements HandlerInterceptor.preHandle; returns 400 JSON on missing/wrong version
cameleer-server-app/src/main/java/com/cameleer/server/app/config/WebConfig.java	Registers interceptor with path patterns	VERIFIED	35 lines; addInterceptors registers interceptor on /api/v1/data/** and /api/v1/agents/**; excludes health, api-docs, swagger-ui
cameleer-server-app/src/test/java/com/cameleer/server/app/AbstractClickHouseIT.java	Shared Testcontainers base class for integration tests	VERIFIED	73 lines; static ClickHouseContainer; @DynamicPropertySource; @BeforeAll schema init from SQL file; JdbcTemplate exposed to subclasses

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Key Link Verification

Plan 01-01 Key Links

From	To	Via	Status	Details
ClickHouseConfig.java	application.yml	spring.datasource properties	VERIFIED	application.yml defines spring.datasource.url, username, password, driver-class-name; ClickHouseConfig creates JdbcTemplate(dataSource) relying on Spring Boot auto-config
IngestionConfig.java	application.yml	ingestion.* properties	VERIFIED	application.yml defines ingestion.buffer-capacity, batch-size, flush-interval-ms; IngestionConfig is @ConfigurationProperties(prefix="ingestion")

Plan 01-02 Key Links

From	To	Via	Status	Details
ExecutionController.java	IngestionService.java	Constructor injection	VERIFIED	ExecutionController(IngestionService ingestionService, ...) — IngestionService injected and called on every POST
IngestionService.java	WriteBuffer.java	offer/offerBatch calls	VERIFIED	executionBuffer.offerBatch(executions) and executionBuffer.offer(execution) in acceptExecutions/acceptExecution
ClickHouseFlushScheduler.java	WriteBuffer.java	drain call on scheduled interval	VERIFIED	executionBuffer.drain(batchSize) inside flushExecutions() called by @Scheduled flushAll()
ClickHouseFlushScheduler.java	ClickHouseExecutionRepository.java	insertBatch call	VERIFIED	executionRepository.insertBatch(batch) in flushExecutions()
ClickHouseFlushScheduler.java	ClickHouseDiagramRepository.java	store call after drain	VERIFIED	diagramRepository.store(graph) for each item drained in flushDiagrams()
ClickHouseFlushScheduler.java	ClickHouseMetricsRepository.java	insertBatch call after drain	VERIFIED	metricsRepository.insertBatch(batch) in flushMetrics()

Plan 01-03 Key Links

From	To	Via	Status	Details
WebConfig.java	ProtocolVersionInterceptor.java	addInterceptors registration	VERIFIED	registry.addInterceptor(protocolVersionInterceptor).addPathPatterns(...)
application.yml	Actuator health endpoint	management.endpoints config	VERIFIED	management.endpoints.web.base-path: /api/v1 and exposure.include: health
application.yml	springdoc	springdoc.api-docs.path and swagger-ui.path	VERIFIED	springdoc.api-docs.path: /api/v1/api-docs and springdoc.swagger-ui.path: /api/v1/swagger-ui

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Requirements Coverage

Requirement	Source Plan	Description	Status	Evidence
INGST-01 (#1)	01-02	POST /api/v1/data/executions returns 202	SATISFIED	ExecutionController, ExecutionControllerIT.postSingleExecution_returns202 and postArrayOfExecutions_returns202
INGST-02 (#2)	01-02	POST /api/v1/data/diagrams returns 202	SATISFIED	DiagramController, DiagramControllerIT.postSingleDiagram_returns202 and postArrayOfDiagrams_returns202
INGST-03 (#3)	01-02	POST /api/v1/data/metrics returns 202	SATISFIED	MetricsController, MetricsControllerIT.postMetrics_returns202
INGST-04 (#4)	01-01	In-memory batch buffer with configurable flush interval/size	SATISFIED	WriteBuffer with ArrayBlockingQueue; IngestionConfig with buffer-capacity, batch-size, flush-interval-ms; ClickHouseFlushScheduler drains on interval
INGST-05 (#5)	01-01, 01-02	503 when write buffer is full	SATISFIED	ExecutionController checks !accepted and returns 503 + Retry-After: 5; BackpressureIT.whenBufferFull_returns503WithRetryAfter
INGST-06 (#6)	01-01, 01-03	ClickHouse TTL expires data after 30 days	SATISFIED	01-schema.sql TTL clauses toDateTime(start_time) + toIntervalDay(30) on route_executions and agent_metrics; HealthControllerIT.ttlConfiguredOnRouteExecutions and ttlConfiguredOnAgentMetrics
API-01 (#28)	01-03	All endpoints follow /api/v1/... path structure	SATISFIED	All controllers use @RequestMapping("/api/v1/data"); actuator at /api/v1; springdoc at /api/v1/api-docs
API-02 (#29)	01-03	API documented via OpenAPI/Swagger	SATISFIED	springdoc-openapi 2.8.6 in pom; @Operation/@Tag annotations on controllers; OpenApiIT.apiDocsReturnsOpenApiSpec
API-03 (#30)	01-03	GET /api/v1/health endpoint	SATISFIED	Spring Boot Actuator health at /api/v1/health; HealthControllerIT.healthEndpointReturns200WithStatus
API-04 (#31)	01-03	X-Cameleer-Protocol-Version:1 header validated	SATISFIED	ProtocolVersionInterceptor returns 400 on missing/wrong version; ProtocolVersionIT with 5 test cases
API-05 (#32)	01-03	Unknown JSON fields accepted	SATISFIED	spring.jackson.deserialization.fail-on-unknown-properties: false in application.yml; ForwardCompatIT.unknownFieldsInRequestBodyDoNotCauseError

All 11 phase-1 requirements: SATISFIED

No orphaned requirements — all 11 IDs declared in plan frontmatter match the REQUIREMENTS.md Phase 1 assignment.

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Anti-Patterns Found

No anti-patterns detected. Scanned all source files in cameleer-server-app/src/main and cameleer-server-core/src/main for TODO/FIXME/PLACEHOLDER/stub return patterns. None found.

One minor observation (not a blocker):

File	Observation	Severity	Impact
BackpressureIT.java:79-103	bufferedDataNotLost_afterBackpressure asserts getDiagramBufferDepth() >= 3 rather than querying ClickHouse after a flush. Verifies data stays in buffer, not that it ultimately persists.	Info	Not a blocker — the scheduler flush path for diagrams is fully verified by DiagramControllerIT.postDiagram_dataAppearsInClickHouseAfterFlush. The test correctly guards against the buffer accepting data but discarding it before flush.

Also notable (by design): ClickHouseExecutionRepository sets agent_id = "" for all inserts (line 59), since the HTTP controller does not extract an agent ID from headers. This is an intentional gap left for Phase 3 (agent registry) and does not block Phase 1 goal achievement.

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Human Verification Required

None. All phase-1 success criteria are verifiable programmatically. Integration tests with Testcontainers cover the full stack including ClickHouse.

One item that would benefit from a quick runtime smoke test if the team desires confidence beyond the test suite:

Optional smoke test: Run docker compose up -d, then POST to /api/v1/data/executions with curl, wait 2 seconds, query ClickHouse directly to confirm the row arrived. This is already covered by ExecutionControllerIT against Testcontainers but can be done end-to-end against Docker Compose if desired.

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Gaps Summary

No gaps. All phase goal truths are verified, all required artifacts exist and are substantively implemented, all key wiring links are confirmed, and all 11 requirements are satisfied. The phase delivers on its stated goal:

Agents can POST execution data, diagrams, and metrics to the server, which batch-writes them to ClickHouse with TTL retention and backpressure protection.

Specific confirmations:

• Batch buffering and flush: WriteBuffer (ArrayBlockingQueue) decouples HTTP from ClickHouse; ClickHouseFlushScheduler drains at configurable interval with graceful shutdown drain via SmartLifecycle
• Backpressure: WriteBuffer.offer/offerBatch returning false causes controllers to return 503 Service Unavailable with Retry-After: 5 header
• TTL retention: ClickHouse DDL includes TTL toDateTime(start_time) + toIntervalDay(30) on route_executions and TTL toDateTime(collected_at) + toIntervalDay(30) on agent_metrics, verified by integration test querying SHOW CREATE TABLE
• API foundation: Health at /api/v1/health, OpenAPI at /api/v1/api-docs, protocol version header enforced on data/agent paths, unknown JSON fields accepted

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Verified: 2026-03-11 Verifier: Claude (gsd-verifier)