# CLAUDE.md

This file provides guidance to Claude Code (claude.ai/code) when working with code in this repository.

## Project

Cameleer Server — observability server that receives, stores, and serves Camel route execution data and route diagrams from Cameleer agents. Pushes config and commands to agents via SSE. Also orchestrates Docker container deployments when running under cameleer-saas.

## Related Project

- **cameleer** (`https://gitea.siegeln.net/cameleer/cameleer`) — the Java agent that instruments Camel applications
- Protocol defined in `cameleer-common/PROTOCOL.md` in the agent repo
- This server depends on `com.cameleer:cameleer-common` (shared models and graph API)

## Modules

- `cameleer-server-core` — domain logic, storage interfaces, services (no Spring dependencies)
- `cameleer-server-app` — Spring Boot web app, REST controllers, SSE, persistence, Docker orchestration

## Build Commands

```bash
mvn clean compile          # Compile all modules
mvn clean verify           # Full build with tests
```

## Run

```bash
java -jar cameleer-server-app/target/cameleer-server-app-1.0-SNAPSHOT.jar
```

## Key Conventions

- Java 17+ required
- Spring Boot 3.4.3 parent POM
- Depends on `com.cameleer:cameleer-common` from Gitea Maven registry
- Jackson `JavaTimeModule` for `Instant` deserialization
- Communication: receives HTTP POST data from agents (executions, diagrams, metrics, logs), serves SSE event streams for config push/commands (config-update, deep-trace, replay, route-control)
- URL taxonomy: user-facing data, config, and query endpoints live under `/api/v1/environments/{envSlug}/...`. Env is a path segment, resolved via the `@EnvPath` argument resolver (404 on unknown slug). Flat endpoints are only for: agent self-service (JWT-authoritative), cross-env admin (RBAC, OIDC, audit, license, thresholds, env CRUD), cross-env discovery (`/catalog`), content-addressed lookups (`/diagrams/{contentHash}/render`, `/executions/{id}`), and auth. See `.claude/rules/app-classes.md` for the full allow-list.
- Slug immutability: environment and app slugs are immutable after creation (both appear in URLs, Docker network names, container names, and ClickHouse partition keys). Slug regex `^[a-z0-9][a-z0-9-]{0,63}$` is enforced on POST; update endpoints silently drop any slug field in the request body via Jackson's default unknown-property handling.
- App uniqueness: `(environment_id, app_slug)` is the natural key. The same app slug can legitimately exist in multiple environments; `AppService.getByEnvironmentAndSlug(envId, slug)` is the canonical lookup for controllers. Bare `getBySlug(slug)` remains for internal use but is ambiguous across envs.
- Environment filtering: all data queries filter by the selected environment. All commands target only agents in the selected environment. Env is required on every env-scoped endpoint (path param); the legacy `?environment=` query form is retired.
- Maintains agent instance registry (in-memory) with states: LIVE -> STALE -> DEAD. Auto-heals from JWT `env` claim + heartbeat body on heartbeat/SSE after server restart (priority: heartbeat `environmentId` > JWT `env` claim; no silent default — missing env on heartbeat auto-heal returns 400). Registration (`POST /api/v1/agents/register`) requires `environmentId` in the request body; missing or blank returns 400. Capabilities and route states updated on every heartbeat (protocol v2). Route catalog merges three sources: in-memory agent registry, persistent `route_catalog` table (ClickHouse), and `stats_1m_route` execution stats. The persistent catalog tracks `first_seen`/`last_seen` per route per environment, updated on every registration and heartbeat. Routes appear in the sidebar when their lifecycle overlaps the selected time window (`first_seen <= to AND last_seen >= from`), so historical routes remain visible even after being dropped from newer app versions.
- Multi-tenancy: each server instance serves one tenant (configured via `CAMELEER_SERVER_TENANT_ID`, default: `"default"`). Environments (dev/staging/prod) are first-class. PostgreSQL isolated via schema-per-tenant (`?currentSchema=tenant_{id}`) and `ApplicationName=tenant_{id}` on the JDBC URL. ClickHouse shared DB with `tenant_id` + `environment` columns, partitioned by `(tenant_id, toYYYYMM(timestamp))`.
- Storage: PostgreSQL for RBAC, config, and audit; ClickHouse for all observability data (executions, search, logs, metrics, stats, diagrams). ClickHouse schema migrations in `clickhouse/*.sql`, run idempotently on startup by `ClickHouseSchemaInitializer`. Use `IF NOT EXISTS` for CREATE and ADD PROJECTION.
- Log exchange correlation: `ClickHouseLogStore` extracts `exchange_id` from log entry MDC, preferring `cameleer.exchangeId` over `camel.exchangeId` (fallback for older agents). For `ON_COMPLETION` exchange copies, the agent sets `cameleer.exchangeId` to the parent's exchange ID via `CORRELATION_ID`.
- Log processor correlation: The agent sets `cameleer.processorId` in MDC, identifying which processor node emitted a log line.
- Logging: ClickHouse JDBC set to INFO (`com.clickhouse`), HTTP client to WARN (`org.apache.hc.client5`) in application.yml
- Security: JWT auth with RBAC (AGENT/VIEWER/OPERATOR/ADMIN roles), Ed25519 config signing (key derived deterministically from JWT secret via HMAC-SHA256), bootstrap token for registration. CORS: `CAMELEER_SERVER_SECURITY_CORSALLOWEDORIGINS` (comma-separated) overrides `CAMELEER_SERVER_SECURITY_UIORIGIN` for multi-origin setups. Infrastructure access: `CAMELEER_SERVER_SECURITY_INFRASTRUCTUREENDPOINTS=false` disables Database and ClickHouse admin endpoints. Last-ADMIN guard: system prevents removal of the last ADMIN role (409 Conflict). Password policy: min 12 chars, 3-of-4 character classes, no username match. Brute-force protection: 5 failed attempts -> 15 min lockout. Token revocation: `token_revoked_before` column on users, checked in `JwtAuthenticationFilter`, set on password change.
- OIDC: Optional external identity provider support (token exchange pattern). Configured via admin API/UI, stored in database (`server_config` table). Resource server mode: accepts external access tokens (Logto M2M) via JWKS validation when `CAMELEER_SERVER_SECURITY_OIDCISSUERURI` is set. Scope-based role mapping via `SystemRole.normalizeScope()`. System roles synced on every OIDC login via `applyClaimMappings()` in `OidcAuthController` (calls `clearManagedAssignments` + `assignManagedRole` on `RbacService`) — always overwrites managed role assignments; uses managed assignment origin to avoid touching group-inherited or directly-assigned roles. Supports ES384, ES256, RS256.
- OIDC role extraction: `OidcTokenExchanger` reads roles from the **access_token** first (JWT with `at+jwt` type), then falls back to id_token. `OidcConfig` includes `audience` (RFC 8707 resource indicator) and `additionalScopes`. All provider-specific configuration is external — no provider-specific code in the server.
- Sensitive keys: Global enforced baseline for masking sensitive data in agent payloads. Merge rule: `final = global UNION per-app` (case-insensitive dedup, per-app can only add, never remove global keys).
- User persistence: PostgreSQL `users` table, admin CRUD at `/api/v1/admin/users`
- Usage analytics: ClickHouse `usage_events` table tracks authenticated UI requests, flushed every 5s

## Database Migrations

PostgreSQL (Flyway): `cameleer-server-app/src/main/resources/db/migration/`
- V1 — RBAC (users, roles, groups, audit_log). `application_config` PK is `(application, environment)`; `app_settings` PK is `(application_id, environment)` — both tables are env-scoped.
- V2 — Claim mappings (OIDC)
- V3 — Runtime management (apps, environments, deployments, app_versions)
- V4 — Environment config (default_container_config JSONB)
- V5 — App container config (container_config JSONB on apps)
- V6 — JAR retention policy (jar_retention_count on environments)
- V7 — Deployment orchestration (target_state, deployment_strategy, replica_states JSONB, deploy_stage)
- V8 — Deployment active config (resolved_config JSONB on deployments)
- V9 — Password hardening (failed_login_attempts, locked_until, token_revoked_before on users)
- V10 — Runtime type detection (detected_runtime_type, detected_main_class on app_versions)
- V11 — Outbound connections (outbound_connections table, enums)
- V12 — Alerting tables (alert_rules, alert_rule_targets, alert_instances, alert_notifications, alert_reads, alert_silences)
- V13 — alert_instances open-rule unique index (alert_instances_open_rule_uq partial index on rule_id WHERE state IN PENDING/FIRING/ACKNOWLEDGED)

ClickHouse: `cameleer-server-app/src/main/resources/clickhouse/init.sql` (run idempotently on startup)

## Regenerating OpenAPI schema (SPA types)

After any change to REST controller paths, request/response DTOs, or `@PathVariable`/`@RequestParam`/`@RequestBody` signatures, regenerate the TypeScript types the SPA consumes. Required for every controller-level change.

```bash
# Backend must be running on :8081
cd ui && npm run generate-api:live   # fetches fresh openapi.json AND regenerates schema.d.ts
# OR, if openapi.json was updated by other means:
cd ui && npm run generate-api        # regenerates schema.d.ts from existing openapi.json
```

After regeneration, `ui/src/api/schema.d.ts` and `ui/src/api/openapi.json` will update. The TypeScript compiler then surfaces every SPA call site that needs updating — fix all compile errors before testing in the browser. Commit the regenerated files with the controller change.

## Maintaining .claude/rules/

When adding, removing, or renaming classes, controllers, endpoints, UI components, or metrics, update the corresponding `.claude/rules/` file as part of the same change. The rule files are the class/API map that future sessions rely on — stale rules cause wrong assumptions. Treat rule file updates like updating an import: part of the change, not a separate task.

## Disabled Skills

- Do NOT use any `gsd:*` skills in this project. This includes all `/gsd:` prefixed commands.

<!-- gitnexus:start -->
# GitNexus — Code Intelligence

This project is indexed by GitNexus as **alerting-02** (7810 symbols, 20082 relationships, 300 execution flows). Use the GitNexus MCP tools to understand code, assess impact, and navigate safely.

> If any GitNexus tool warns the index is stale, run `npx gitnexus analyze` in terminal first.

## Always Do

- **MUST run impact analysis before editing any symbol.** Before modifying a function, class, or method, run `gitnexus_impact({target: "symbolName", direction: "upstream"})` and report the blast radius (direct callers, affected processes, risk level) to the user.
- **MUST run `gitnexus_detect_changes()` before committing** to verify your changes only affect expected symbols and execution flows.
- **MUST warn the user** if impact analysis returns HIGH or CRITICAL risk before proceeding with edits.
- When exploring unfamiliar code, use `gitnexus_query({query: "concept"})` to find execution flows instead of grepping. It returns process-grouped results ranked by relevance.
- When you need full context on a specific symbol — callers, callees, which execution flows it participates in — use `gitnexus_context({name: "symbolName"})`.

## When Debugging

1. `gitnexus_query({query: "<error or symptom>"})` — find execution flows related to the issue
2. `gitnexus_context({name: "<suspect function>"})` — see all callers, callees, and process participation
3. `READ gitnexus://repo/alerting-02/process/{processName}` — trace the full execution flow step by step
4. For regressions: `gitnexus_detect_changes({scope: "compare", base_ref: "main"})` — see what your branch changed

## When Refactoring

- **Renaming**: MUST use `gitnexus_rename({symbol_name: "old", new_name: "new", dry_run: true})` first. Review the preview — graph edits are safe, text_search edits need manual review. Then run with `dry_run: false`.
- **Extracting/Splitting**: MUST run `gitnexus_context({name: "target"})` to see all incoming/outgoing refs, then `gitnexus_impact({target: "target", direction: "upstream"})` to find all external callers before moving code.
- After any refactor: run `gitnexus_detect_changes({scope: "all"})` to verify only expected files changed.

## Never Do

- NEVER edit a function, class, or method without first running `gitnexus_impact` on it.
- NEVER ignore HIGH or CRITICAL risk warnings from impact analysis.
- NEVER rename symbols with find-and-replace — use `gitnexus_rename` which understands the call graph.
- NEVER commit changes without running `gitnexus_detect_changes()` to check affected scope.

## Tools Quick Reference

| Tool | When to use | Command |
|------|-------------|---------|
| `query` | Find code by concept | `gitnexus_query({query: "auth validation"})` |
| `context` | 360-degree view of one symbol | `gitnexus_context({name: "validateUser"})` |
| `impact` | Blast radius before editing | `gitnexus_impact({target: "X", direction: "upstream"})` |
| `detect_changes` | Pre-commit scope check | `gitnexus_detect_changes({scope: "staged"})` |
| `rename` | Safe multi-file rename | `gitnexus_rename({symbol_name: "old", new_name: "new", dry_run: true})` |
| `cypher` | Custom graph queries | `gitnexus_cypher({query: "MATCH ..."})` |

## Impact Risk Levels

| Depth | Meaning | Action |
|-------|---------|--------|
| d=1 | WILL BREAK — direct callers/importers | MUST update these |
| d=2 | LIKELY AFFECTED — indirect deps | Should test |
| d=3 | MAY NEED TESTING — transitive | Test if critical path |

## Resources

| Resource | Use for |
|----------|---------|
| `gitnexus://repo/alerting-02/context` | Codebase overview, check index freshness |
| `gitnexus://repo/alerting-02/clusters` | All functional areas |
| `gitnexus://repo/alerting-02/processes` | All execution flows |
| `gitnexus://repo/alerting-02/process/{name}` | Step-by-step execution trace |

## Self-Check Before Finishing

Before completing any code modification task, verify:
1. `gitnexus_impact` was run for all modified symbols
2. No HIGH/CRITICAL risk warnings were ignored
3. `gitnexus_detect_changes()` confirms changes match expected scope
4. All d=1 (WILL BREAK) dependents were updated

## Keeping the Index Fresh

After committing code changes, the GitNexus index becomes stale. Re-run analyze to update it:

```bash
npx gitnexus analyze
```

If the index previously included embeddings, preserve them by adding `--embeddings`:

```bash
npx gitnexus analyze --embeddings
```

To check whether embeddings exist, inspect `.gitnexus/meta.json` — the `stats.embeddings` field shows the count (0 means no embeddings). **Running analyze without `--embeddings` will delete any previously generated embeddings.**

> Claude Code users: A PostToolUse hook handles this automatically after `git commit` and `git merge`.

## CLI

| Task | Read this skill file |
|------|---------------------|
| Understand architecture / "How does X work?" | `.claude/skills/gitnexus/gitnexus-exploring/SKILL.md` |
| Blast radius / "What breaks if I change X?" | `.claude/skills/gitnexus/gitnexus-impact-analysis/SKILL.md` |
| Trace bugs / "Why is X failing?" | `.claude/skills/gitnexus/gitnexus-debugging/SKILL.md` |
| Rename / extract / split / refactor | `.claude/skills/gitnexus/gitnexus-refactoring/SKILL.md` |
| Tools, resources, schema reference | `.claude/skills/gitnexus/gitnexus-guide/SKILL.md` |
| Index, status, clean, wiki CLI commands | `.claude/skills/gitnexus/gitnexus-cli/SKILL.md` |

<!-- gitnexus:end -->
