diff --git a/CHANGELOG.md b/CHANGELOG.md index 9ea05a267..cb6dea0fd 100644 --- a/CHANGELOG.md +++ b/CHANGELOG.md @@ -5,8 +5,139 @@ The format follows [Keep a Changelog](https://keepachangelog.com/en/1.1.0/). ## [Unreleased] +### Changed + +- **Diagnostics spec examples expanded to all 9 providers** (#5320): Updated the + `agents diagnostics` command examples in the specification to show all 9 supported + providers (OpenAI, Anthropic, Google, Gemini, Azure, OpenRouter, Cohere, Groq, + Together), matching the implementation from PR #3469. Rich, plain, JSON, and YAML + example outputs now reflect comprehensive provider coverage with accurate warning + counts and per-provider recommendations. + +### Added + +- **TDD: MCPToolAdapter.infer_resource_slots() TypeError with null properties** (#10470): + Added a TDD issue-capture Behave scenario that reproduces the bug where + `MCPToolAdapter.infer_resource_slots()` raises `TypeError` when the input schema + contains `{"properties": None}`. The test is tagged `@tdd_expected_fail` and will + pass (by inversion) until the underlying bug is fixed. + +- **Architecture Pool Supervisor Milestone Assignment** (#7521): Added a "PR Workflow + for Major Changes" section to the `architecture-pool-supervisor` agent definition + documenting the milestone assignment step for spec PRs. The agent now has + `forgejo_update_pull_request` permission to assign PRs to the current active + milestone after creation, improving traceability of specification changes within + project milestone planning. Includes BDD test coverage for the new workflow + documentation and permission configuration. + +- **Git Worktree TOCTOU Race Condition** (#7507): Fixed a Time-Of-Check-To-Time-Of-Use + (TOCTOU) race condition in `git_worktree.py` that could cause `git worktree add` + operations to fail under concurrent execution. The fix replaces the unsafe + `mkdtemp()` + `rmdir()` pattern with a parent-directory approach that maintains + the OS-level uniqueness guarantee throughout the entire operation. The parent + temporary directory is now persisted and properly cleaned up on both success and + failure paths. Comprehensive BDD test coverage validates the fix under concurrent + execution and confirms proper cleanup behavior. + ### Fixed +- **Atomic `server_connect` config writes** (#993): Fixed `server_connect` in + `cli/commands/server.py` to write all three config values (`server.url`, + `server.namespace`, `server.tls-verify`) atomically. A snapshot of the config + file is taken before any writes; if any `set_value()` call fails, the snapshot is + restored and compensating `CONFIG_CHANGED` events are emitted for already-applied + keys so the audit trail reflects the rollback. Added `emit_config_changed()` helper + to `ConfigService` for decoupled event emission in rollback flows. Added + `close()` method to `ReactiveEventBus` for proper resource cleanup in tests. + Resolved merge conflict in `config_service.py` integrating the PR's + `emit_config_changed()` helper with master's scoped config infrastructure. + Removed `# type: ignore[assignment]` by introducing a typed `_AutoDiscover` + sentinel class. BDD regression coverage in + `features/tdd_server_connect_atomic_writes.feature`. + +- **Atomic `load_from_metadata` for Autonomy Guardrails** (#7504): Fixed + `AutonomyGuardrailService.load_from_metadata()` to validate both + `AutonomyGuardrails` and `GuardrailAuditTrail` models before writing either + to state, ensuring atomic updates. Previously, a validation failure on the + audit trail after guardrails were already written would leave the system in + an inconsistent state with partial updates. The method now uses a two-phase + validate-then-write approach: all model validation occurs in Phase 1, and + state mutations only happen in Phase 2 after all validations succeed. + +- **ReactiveConfigParser route synthesis for v3 actors** (#10807): Fixed + `agents actor run` silently returning empty output for v3 `type:llm` actors. + `_build_from_v3()` and `_build()` now synthesise a default single-node + graph route when agents are created without explicit routes, ensuring + `run_single_shot()` can invoke the LLM via `GraphExecutor`. The nested + `actors:` map format also translates the v3 `actor: "provider/model"` key + into separate `provider` and `model` keys so the correct LLM provider is + instantiated. + +- **ActorRegistry.add() spec-compliant YAML support** (#4466): The registry now + accepts actor YAML using the spec's `actors:` map format with nested `config:` + blocks, in addition to the legacy top-level `provider`/`model` format. The + `unsafe` flag and graph descriptor from nested config are now correctly + preserved during registration. Multi-actor YAML (>1 entry in `actors:`/`agents:` + map) is now rejected by `add()` with a `ValidationError`. Nested + `config.options` are now correctly preserved. The `unsafe` coercion now uses + strict `is True or == 1` instead of `bool()` to prevent truthy non-boolean + YAML values (e.g. `unsafe: "no"`) from being treated as unsafe. + +- **UKO Runtime Layer 2 (Paradigm) Indexing** (#9351): Added missing `rdf:type + uko-oo:Class` triple emission in `PythonAnalyzer._extract_class()` so that + Python class definitions are now correctly classified at layer 2 (paradigm/OO) + in addition to layer 3 (technology). Added the corresponding Behave scenario + `Indexing a Python file populates layer 2 (paradigm)` to + `features/uko_runtime.feature`, completing four-layer guarantee verification + for the UKO runtime. + +- **Actor CLI v3 YAML Schema Support** (#6283): Fixed three components to add + full v3 `ActorConfigSchema` support to the actor CLI registration and + execution paths. `ActorConfiguration.from_blob()` now detects v3 format + (top-level `type` key of `llm`/`graph`/`tool`) and correctly extracts + provider, model, and graph descriptors — including `type: tool` actors + without a `model` field. `ActorRegistry.add()` validates against the full + Pydantic v2 schema, persists `skills`/`lsp`/`description` in the config + blob, and compiles graph actors with proper metadata. + `ReactiveConfigParser._build_from_v3()` now uses correct `source`/`target` + edge keys (fixing `KeyError` in `to_graph_config()`), handles `config: null` + nodes without crashing, propagates `context_view`/`memory`/`context`/ + `env_vars`/`response_format`/`lsp_capabilities`/`lsp_context_enrichment` + into agent configs, and validates `entry_node` against the nodes map. + Exception handling narrowed from broad `except Exception` to specific + `NotFoundError` and `ActorCompilationError`. v3 registration logic + extracted to `v3_registry.py` to keep `registry.py` under the 500-line + limit. 19 BDD scenarios cover all v3 paths including tool actors, + update mode, LSP dict bindings, and field propagation. + +- **TDD Non-AssertionError Guard Visibility** (#8294): `apply_tdd_inversion` in + `features/environment.py` now emits its non-assertion exception guard warning to + both the structured logger and `stderr` via a new `_warning_with_stderr` helper. + This makes the guard firing visible in standard Behave console output and CI log + snippets where the structured logging sink may not be displayed. BDD infrastructure + coverage added: a new scenario in `tdd_expected_fail_infrastructure.feature` + asserts that the warning is emitted to stderr when a non-AssertionError exception + is encountered in an `@tdd_expected_fail` scenario, and a second scenario asserts + the warning is NOT emitted when the exception is an `AssertionError`. The + `CONTRIBUTING.md` now documents that `@tdd_expected_fail` step definitions must + signal expected failures via `AssertionError`. + +- **Parallel Behave Runner Log Noise Reduction** (#8351): The parallel behave + runner now suppresses captured stdout/stderr for passing worker chunks and + only replays diagnostics for failed, errored, or crashed chunks. This makes + failure output significantly easier to spot in CI and local runs. A worker + crash (unhandled exception) is detected via an all-zero summary and the + captured traceback is always surfaced. + +- **Bug Hunt Pool Supervisor Non-Blocking Tracking**: Updated `bug-hunt-pool-supervisor` to make the automation tracking step non-blocking. The `automation-tracking-manager` call in step 5 is now best-effort — if it does not complete within a reasonable time or fails, the supervisor skips it and continues to the next cycle. Added explicit rule 9 clarifying that tracking must never block the main loop. Core functionality (module scanning and worker dispatch) takes priority over status reporting. + +- **Name Validator Server-Qualified Format** (#9074): Updated actor, skill, and tool name + validators to accept the spec-required `[[server:]namespace/]name` format. Previously, + server-qualified names like `dev:freemo/custom-analysis` were incorrectly rejected. + Added BDD scenarios for server-qualified name acceptance and rejection. All three + validators (`ActorConfigSchema.validate_name`, `NAMESPACED_NAME_RE`, + `_TOOL_NAME_PATTERN`) now correctly support optional server prefixes while maintaining + backward compatibility with existing `namespace/name` names. - **BDD Feature File Tags** (#9124): Added required `@a2a`, `@session`, and `@cli` Gherkin tags to all relevant feature files (8 A2A files, 8 session files, 19 CLI files) to enable targeted test execution via `behave features/ --tags=a2a,session,cli`. @@ -20,6 +151,20 @@ The format follows [Keep a Changelog](https://keepachangelog.com/en/1.1.0/). logged at debug level for observability. ### Added +- Wired `StrategyActor` into the real plan execution path: `_get_plan_executor` + in `plan.py` now resolves the strategy actor via `resolve_strategy_actor()` + (reading the `actor.default.strategy` config key) instead of always + constructing `LLMStrategizeActor`. `run_strategize` in `PlanExecutor` now + passes `resources` (derived from `plan.project_links`) and `project_context` + to the actor so the LLM prompt receives full project context. Strategy + decisions are serialised as JSON in `plan.error_details["strategy_decisions_json"]` + so `_build_decisions` can reconstruct the full hierarchy (dependency ordering, + parent/child structure) during Execute instead of rebuilding from + `definition_of_done`. `StrategizeStubActor.execute` accepts `**kwargs` for + forward-compatibility. Added BDD coverage for the stored-JSON path, + corrupt-JSON fallback, resource-passing, and stub extra-kwargs scenarios. + (#828) + - **TDD Issue-Capture Test Activation** (#7025): Replaced 234 bare `@skip` tags across 82 Behave feature files with the correct `@tdd_expected_fail @tdd_issue @@ -60,10 +205,10 @@ The format follows [Keep a Changelog](https://keepachangelog.com/en/1.1.0/). `new-issue-creator`, and `issue-state-updater` now delegate all label operations to this subagent. -- **PR–Issue Label Synchronization**: PRs now inherit `Priority/`, `MoSCoW/`, `Points/`, +- **PR-Issue Label Synchronization**: PRs now inherit `Priority/`, `MoSCoW/`, `Points/`, and `State/` labels from their associated issues at creation time (`pr-api-creator`). The `backlog-groomer` adds a continuous Pass 19 for ongoing - PR–issue label synchronization. The `issue-state-updater` syncs PR state labels whenever + PR-issue label synchronization. The `issue-state-updater` syncs PR state labels whenever issue states change. - **Automation Tracking Announcements**: Extended `automation-tracking-manager` with @@ -77,14 +222,14 @@ The format follows [Keep a Changelog](https://keepachangelog.com/en/1.1.0/). the `*-pool-supervisor` naming pattern. New agents added: `pr-editor` (safe PR editing with description preservation), `pr-manager` (unified PR interface), and `pr-merge-pool-supervisor` (automated PR merging supervisor). Renamed: - `pr-api-creator` → `pr-creator`, `pr-checker` → `pr-ci-test-fixer`, - `pr-status-checker` → `pr-status-analyzer`, `pr-self-reviewer` → `pr-reviewer`, - `pr-fix-orchestrator` → `pr-fix-pool-supervisor`. + `pr-api-creator` to `pr-creator`, `pr-checker` to `pr-ci-test-fixer`, + `pr-status-checker` to `pr-status-analyzer`, `pr-self-reviewer` to `pr-reviewer`, + `pr-fix-orchestrator` to `pr-fix-pool-supervisor`. - **Automated PR Merging** (`pr-merge-pool-supervisor`): New supervisor continuously monitors for merge-ready PRs and merges them automatically when all criteria are met (approvals, CI passing, no conflicts). Supports both formal reviews and comment-based - approvals (LGTM, ✅, "ready to merge", etc.). + approvals (LGTM, ready to merge, etc.). - **Implementation Worker Workflow Completion**: `implementation-worker` now implements work claiming protocols with conflict detection, comprehensive review feedback handling @@ -114,8 +259,21 @@ The format follows [Keep a Changelog](https://keepachangelog.com/en/1.1.0/). `docs/development/automation-tracking.md` and the new `docs/development/docs-writer.md` reference. +- **ACMS / UKO API Documentation** (`docs/api/acms.md`): Added comprehensive API + reference for the `cleveragents.acms` package covering the four-layer UKO ontology + hierarchy, `VocabularyRegistry`, `ProvenanceInfo`, `UKOClass`, `UKOProperty`, + `UKOVocabulary`, `Layer2Dependency`, `ParadigmVocabulary`, `DetailLevelMapBuilder`, + and all Layer 3 language vocabulary types (Python, TypeScript, Rust, Java). + The new page is linked from the API Reference index and the MkDocs navigation. + ### Changed +- **`product-builder` Worker Allocation Tier Comments** (#8169): Clarified the + `N_FULL` tier comment to explicitly document that PR fixing is handled by + `implementation-pool-supervisor` via its PR-First Priority rule. Updated the + `N_QUARTER` comment to enumerate the pools it covers (UAT, bug hunting, test + infra). Prevents confusion about which supervisor handles PR fix work. + - **Decision Tree Full ULID Display** (#5825): The `agents plan tree` command now displays full 26-character ULIDs for all decisions instead of truncating them to 8 characters. This enables users to copy decision IDs directly from tree output @@ -129,7 +287,7 @@ The format follows [Keep a Changelog](https://keepachangelog.com/en/1.1.0/). - **PR Review Policy**: Reduced PR review requirement from 2 approvals to 1. Self-approval is now permitted including for automated bot PRs. Approval can be a formal review OR an - approval comment (LGTM, Approved, ✅, "ready to merge"). + approval comment (LGTM, Approved, ready to merge). - **Label Delegation Enforcement**: `automation-tracking-manager` now enforces delegation to `forgejo-label-manager` for all label operations, preventing "invalid label ID" errors @@ -155,6 +313,28 @@ The format follows [Keep a Changelog](https://keepachangelog.com/en/1.1.0/). instead of silently racing. Lock is acquired before phase transition and released in a `finally` block to ensure cleanup even on error. +- **`--format color` ANSI Output** (#7910): Fixed `format_output` routing the `color` format + option to `_format_plain`, which produced plain uncoloured text instead of ANSI escape + sequences. The `color` format is now routed to `format_output_session` which uses the + `ColorMaterializer` to emit proper ANSI-coloured output. `--format plain` and all other + formats remain unaffected. + +- **ContextTierService Thread Safety** (#7547): Added `threading.RLock` to + `ContextTierService` to prevent `RuntimeError: dictionary changed size during + iteration` and data corruption under concurrent plan execution. All public + methods (`store`, `get`, `promote`, `demote`, `evict_lru`, `enforce_staleness`, + `get_metrics`, `get_all_fragments`, `get_hot_fragments`, `get_for_actor`, + `get_scoped_view`, `get_scoped_by_resource`, `get_scoped_metrics`) now acquire + the reentrant lock before accessing the hot/warm/cold tier dicts. The service + was previously documented as single-threaded but registered as a DI Singleton, + causing potential data corruption when parallel subplans shared the same + instance. The `TierRuntimeMixin.enforce_staleness()` and + `ScopedTierMixin.get_scoped_by_resource()` / `get_scoped_metrics()` methods + are also protected. The DI container registration as `providers.Singleton` + is now correct and safe. + +- **TOCTOU Race Condition in Git Worktree Sandbox** (#7507): Fixed Time-Of-Check-To-Time-Of-Use race condition in `GitWorktreeSandbox.create()` by replacing unsafe mkdtemp+rmdir pattern with persistent parent directory approach. Parent directory is now held throughout operation lifetime and properly cleaned up in all error paths (timeout, CalledProcessError, OSError) and in the cleanup() method, eliminating race window where another process could claim the worktree path. Comprehensive BDD coverage added for all error-path cleanup branches. + - **Validation Gate Empty-Run Guard** (#7508): Fixed `ApplyValidationSummary.all_required_passed` returning `True` when zero validations were run, silently bypassing the apply gate. The property now returns `False` when the validation result set is empty (`is_empty` is `True`), ensuring @@ -178,7 +358,7 @@ The format follows [Keep a Changelog](https://keepachangelog.com/en/1.1.0/). - **SubplanExecutionService fail_fast cancellation** (#7582): Fixed a race condition where already-running parallel subplans were not cancelled when `fail_fast` fired. Previously, `Future.cancel()` only prevented queued futures from starting but had no effect on - in-flight futures that completed after `stop_flag` was set — their `COMPLETE` results + in-flight futures that completed after `stop_flag` was set -- their `COMPLETE` results were incorrectly included in the merge output. The fix adds a post-completion guard that overrides any non-`ERRORED`/non-`CANCELLED` result to `CANCELLED` when `stop_flag` is active, and clears the associated output to prevent it from entering the merge. Also @@ -193,6 +373,11 @@ The format follows [Keep a Changelog](https://keepachangelog.com/en/1.1.0/). e2e test files and removed `tdd_expected_fail` from 4 context assembly e2e tests where bugs were already fixed. +- **PluginLoader entry point prefix validation** (#7476): Parse entry point targets before + import, enforce the module allowlist ahead of loading, and add Behave plus Robot Framework + regression coverage to ensure disallowed prefixes never execute untrusted module-level code + in either unit or integration flows. + - **`issue-state-updater` Bash Script Errors**: Removed problematic bash script examples that tried to invoke `task forgejo-label-manager` as a bash command (the Task tool cannot be invoked from bash). Replaced with clear step-by-step operational instructions and @@ -207,9 +392,14 @@ The format follows [Keep a Changelog](https://keepachangelog.com/en/1.1.0/). `pr-merge-pool-supervisor` to the product-builder's supervisor launch list (18 total supervisors). Updated all numeric references, pre-flight checklists, and validation logic. +- `ActionRepository.update()` now uses explicit bulk `sa_delete()` + `session.flush()` + before re-inserting child rows for `action_arguments` and `action_invariants`, fixing + a `sqlite3.IntegrityError: UNIQUE constraint failed` crash when `agents plan use` was + called on an action that already had arguments registered via `action create`. (#4197) + --- -## [3.8.0] — 2026-04-05 +## [3.8.0] -- 2026-04-05 ### Added @@ -220,171 +410,14 @@ The format follows [Keep a Changelog](https://keepachangelog.com/en/1.1.0/). `INVARIANT_VIOLATED` events. Post-correction reconciliation runs via `CORRECTION_APPLIED` event subscription (best-effort). Added `InvariantService` Singleton provider in the DI container. -- **TUI — Shell danger detection**: The TUI shell mode (`!` prefix) now detects +- **TUI -- Shell danger detection**: The TUI shell mode (`!` prefix) now detects dangerous command patterns before execution. A configurable pattern registry classifies commands by danger level (warning, critical) and surfaces a user warning overlay before proceeding. Patterns cover destructive filesystem operations, privilege escalation, network exfiltration, and more. (#1003) -- **TUI — Permission Question Widget**: A new inline `PermissionQuestionWidget` +- **TUI -- Permission Question Widget**: A new inline `PermissionQuestionWidget` renders permission requests directly in the conversation stream for single-file operations. Users can allow/reject with single-key shortcuts (`a`/`A`/`r`/`R`), navigate with arrow keys, confirm with `Enter`, or press `v` to open the full - permissions screen. (#1004) -- **TUI — Actor thought blocks**: Expandable reasoning trace widgets rendered - inline in the conversation stream with muted styling. Collapsed by default; - expand with `Space` or click. (#1005) - -- **UKO provenance tracking**: Every typed triple now carries `sourceResource`, - `validFrom`, and `isCurrent` metadata. A revision chain enables temporal - queries and point-in-time ontology state reconstruction. - -- **JSON-RPC 2.0 A2A wire format**: `A2aRequest`/`A2aResponse` fields renamed to - standard JSON-RPC 2.0 names (`method`, `id`, `result`, `error`). The - `A2aVersionNegotiator` handles backward compatibility. - -- **Database resource handler**: Full CRUD and checkpoint/rollback support for - SQLite, PostgreSQL, MySQL, and DuckDB resources via the resource DAG. - -- **Estimation lifecycle hook**: `actor.default.estimation` config key wires an - estimation actor into the Strategize-to-Estimate lifecycle hook. - -- **Persona system**: YAML-backed personas bind actors, argument presets, and scope - references to named identities; persisted in `~/.config/cleveragents/personas/`. - -- **Session management**: Create, list, export, and import conversation sessions; - full JSON export/import for portability; Markdown transcript export - (`--format md`) for human-readable sharing. - -- **First-run experience**: `ActorSelectionOverlay` guides new users to pick an - actor on first TUI launch; creates a `"default"` persona automatically. - -- **Server mode**: `agents server connect` configures a remote CleverAgents server; - Kubernetes Helm chart in `k8s/` for production deployment. - -- **A2A integration**: Agent-to-Agent protocol facade wires CLI and TUI to live - application services (session, plan, registry, event). - -- **Permissions screen**: TUI overlay for reviewing tool permission requests with - unified, side-by-side, and context diff views; session-scoped allow/reject decisions. - -- **Inline permission questions**: `PermissionQuestionWidget` renders single-file - permission requests directly in the conversation stream with single-key shortcuts. - -- **Invariant reconciliation**: `InvariantReconciliationActor` runs automatically at - every plan phase transition; failures block the transition and emit `INVARIANT_VIOLATED`. - -- **UKO runtime**: Universal Knowledge Ontology query interface, inference engine, and - graph persistence for ACMS context strategies. - -### Fixed - -- `LangChainChatProvider.name` and `model_id` are now mutable properties with setters, - fixing an `AttributeError` when `PlanService` attempted to resolve provider names after - instantiation. (#1553) - ---- - -## [3.7.0] — 2026-03-15 - -### Added - -- **Interactive TUI** (`agents tui`) — full-screen Textual app with multi-session tabs, - persona switching, slash commands (67 commands across 14 groups), reference picker - (`@`), shell mode (`!`), context-sensitive F1 help, and `Ctrl+T` argument preset cycling. -- **Slash command system** — 67 commands across 14 groups accessible via `/` overlay. -- **Reference picker** — `@` key opens a file/resource reference picker that inserts - references into the input field. -- **TUI persona system** — YAML-backed personas bind actors, argument presets, and scope - references; persisted in `~/.config/cleveragents/personas/`. -- **TUI session export/import** — full JSON round-trip and Markdown transcript export - (`--format md`). - ---- - -## [3.6.0] — 2026-02-28 - -### Added - -- Advanced Context Management System (ACMS) with three-tier context strategy. -- UKO Runtime (Universal Knowledge Ontology) with graph persistence and inference engine. -- Implicit inference engine producing `uko:implicitSiblingOf`, `uko:implicitContains`, - and `uko:implicitDependsOn` triples with confidence 0.7. - ---- - -## [3.5.0] — 2026-02-14 - -### Added - -- Autonomy hardening: advisory locking, validation pipeline, definition-of-done gating. -- Resource DAG with dependency tracking and type hierarchy with multiple inheritance. -- Container resource types (`container.docker`, `container.podman`). -- LSP resource types (`lsp.*`). - ---- - -## [3.4.0] — 2026-01-31 - -### Added - -- ACMS v1 with context scaling strategies. -- Resource type inheritance system (ADR-042). -- Safety profile extraction (ADR-041). - ---- - -## [3.3.0] — 2026-01-17 - -### Added - -- Corrections and subplans support in plan lifecycle. -- Checkpoint and rollback for all resource writes. -- Decision tree versioning and history (ADR-034). -- Decision tree rollback and replay (ADR-035). - ---- - -## [3.2.0] — 2026-01-03 - -### Added - -- Decisions, validations, and invariants in plan lifecycle. -- Validation abstraction layer (ADR-013). -- Invariant system (ADR-016). -- Automation profiles (ADR-017). -- Semantic error prevention (ADR-018). - ---- - -## [3.1.0] — 2025-12-20 - -### Added - -- MCP (Model Context Protocol) adapter and client (ADR-029). -- LSP (Language Server Protocol) client integration (ADR-027). -- Agent Skills Standard (AgentSkills.io) support (ADR-028). -- Skill abstraction definition (ADR-030). - ---- - -## [3.0.0] — 2025-12-06 - -### Added - -- Initial public release of CleverAgents Core. -- Unified `agents` / `cleveragents` CLI entry points. -- Layered architecture: Entry Points → Application → Domain → Infrastructure → Integration → Core. -- Actor system with YAML-defined LangGraph node graphs. -- Tool system with four-stage lifecycle (activate → validate → execute → deactivate). -- Skill system with three-tier progressive disclosure. -- Resource system with DAG and type hierarchy. -- A2A (Agent-to-Agent) protocol facade. -- DI container (`cleveragents.application.container`). -- LangChain/LangGraph integration (ADR-022). -- Provider registry with fallback chain (OpenAI → Anthropic → Google → Azure → OpenRouter → Groq → Together → Cohere). -- Observability: structured logging, metrics, audit trail, token/cost tracking. -- BDD test suite (Behave + Robot Framework). -- Nox automation for lint, typecheck, tests, docs, benchmarks. -- MkDocs-powered documentation with CleverAgents branding.