The format_output() function in src/cleveragents/cli/formatting.py had two routing bugs that caused incorrect output for the 'rich' and 'color' formats: 1. The 'rich' format had no explicit dispatch branch and silently fell through to the final JSON fallback, returning raw JSON instead of styled terminal output. Since 'rich' is the default CLI format (per ADR-021), this meant all commands using format_output() (version, info, diagnostics) produced JSON by default. 2. The 'color' format was incorrectly routed to _format_plain() instead of a color-aware renderer, producing plain text with no ANSI color codes. Fix: - Added _format_rich() helper that delegates to RichMaterializer via OutputSession, producing ANSI-styled terminal output consistent with format_output_session(). - Added _format_color() helper that delegates to ColorMaterializer via OutputSession, producing ANSI-colored terminal output. - Added explicit OutputFormat.RICH dispatch in format_output() routing. - Fixed OutputFormat.COLOR dispatch to use _format_color() instead of _format_plain(). Tests: - Updated existing BDD scenario that was validating the buggy behavior (expected JSON for rich format) to now assert correct styled output. - Added new BDD scenarios: 'rich format produces styled terminal output not JSON' and 'color format produces ANSI-colored output not plain text'. - Added Robot Framework integration tests in cli_formats.robot and helper_cli_formats.py verifying end-to-end styled output for both formats. All nox sessions pass: lint, typecheck, unit_tests, security_scan. ISSUES CLOSED: #2921
CleverAgents Core
CleverAgents is a Python-first automation platform. It provides a unified agents CLI,
an interactive Textual TUI, embedded runtime, and service orchestration tools while
embracing modern Python tooling.
Highlights
- Unified CLI entry points:
cleveragentsandagents - Interactive TUI (
agents tui) — full-screen Textual app with multi-session tabs, persona switching, slash commands, reference picker, and context-sensitive F1 help - 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 —
ActorSelectionOverlayguides new users to pick an actor on first TUI launch; creates a"default"persona automatically - Server mode —
agents server connectconfigures a remote CleverAgents server; Kubernetes Helm chart ink8s/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
- Actor thought blocks — expandable reasoning trace widgets rendered inline in the conversation stream with muted styling
- UKO runtime — Universal Knowledge Ontology query interface, inference engine, and graph persistence for ACMS context strategies
- Database resource handler — full CRUD and checkpoint/rollback support for SQLite, PostgreSQL, MySQL, and DuckDB resources
- Estimation lifecycle —
actor.default.estimationconfig key wires an estimation actor into the Strategize-to-Estimate lifecycle hook - Shell danger detection — TUI shell mode (
!prefix) classifies commands by danger level (LOW → CRITICAL) and surfaces a warning overlay before executing destructive, privilege-escalating, or exfiltration-risk commands - Inline permission questions —
PermissionQuestionWidgetrenders single-file permission requests directly in the conversation stream with single-key shortcuts - Invariant reconciliation —
InvariantReconciliationActorruns automatically at every plan phase transition; failures block the transition and emitINVARIANT_VIOLATED - UKO provenance tracking — every typed triple now carries
sourceResource,validFrom, andisCurrentmetadata; a revision chain enables temporal queries - JSON-RPC 2.0 A2A wire format —
A2aRequest/A2aResponsefields renamed to standard JSON-RPC 2.0 names (method,id,result,error) - Fast Typer/Click-based interface with parity for help/version behavior
- Behavior-driven coverage via Behave and Robot Framework
- Nox automation for linting, typing, testing, docs, builds, and benchmarks
- MkDocs-powered documentation with CleverAgents branding
Quick Start
# clone the CleverAgents core repository
git clone https://git.cleverthis.com/cleveragents/core.git
cd core
# install dependencies
python -m venv .venv
source .venv/bin/activate
pip install -e ".[dev,tests,docs]"
# set up pre-commit hooks and verify tooling
bash scripts/setup-dev.sh
# verify the CLI
agents --help
agents --version
Launch the TUI
# install TUI extra
pip install -e ".[tui]"
# launch the interactive terminal UI
agents tui
Inside the TUI:
- Type a message and press
Enterto chat with the active actor - Press
/to open the slash command overlay (67 commands across 14 groups) - Press
@to open the reference picker and insert file/resource references - Press
!to enter shell mode and run a subprocess command - Press
F1to toggle the context-sensitive help panel - Press
Ctrl+Tto cycle through argument presets for the active persona - Press
Ctrl+Qto quit
Session management
agents session create --actor openai/gpt-4o
agents session list
agents session export --session-id <ID> --output session.json
agents session import --input session.json
Server mode
# connect to a remote CleverAgents server
agents server connect --url https://my-server.example.com --token <TOKEN>
# check connection status
agents server status
Developing
Pre-commit hooks run automatically on every git commit (formatting, linting, type
checking, security scanning). To run checks manually:
# core validation
nox -s format # ruff auto-formatting
nox -s lint # ruff linting
nox -s typecheck # pyright type checking
nox -s unit_tests # behave unit tests
nox -s integration_tests # robot integration tests
# quality & security
nox -s security_scan # bandit security scanning
nox -s dead_code # vulture dead code detection
nox -s complexity # radon complexity analysis
nox -s pre_commit # run all pre-commit hooks
nox -s adr_compliance # verify ADR compliance
For the full quality automation guide, see docs/development/quality-automation.md.
Documentation
nox -s docs
nox -s serve_docs
Tests
Behave feature scenarios live under features/ and Robot suites under robot/. Use the Nox sessions above to execute them in parity with the implementation plan.
Observability
LangSmith tracing is optional and off by default. Enable it by exporting CLEVERAGENTS_LANGSMITH_ENABLED=true along with a project name and API key (CLEVERAGENTS_LANGSMITH_PROJECT, CLEVERAGENTS_LANGSMITH_API_KEY). The settings module automatically mirrors these values to LANGCHAIN_TRACING_V2, LANGCHAIN_PROJECT, and LANGCHAIN_API_KEY, so LangChain/LangGraph agents emit traces without extra wiring. Additional knobs such as CLEVERAGENTS_LANGSMITH_ENDPOINT, CLEVERAGENTS_LANGSMITH_USER_ID, and CLEVERAGENTS_LANGSMITH_TAGS are documented in docs/observability.md.
LLM provider configuration
CleverAgents ships with a LangChain/LangGraph powered provider registry that discovers whichever API keys you export and automatically selects the best available provider. The CLI now uses actors: select an actor with --actor <name> (or set a default via agents actor set-default). Actors embed provider/model choices; built-in actors are seeded from CLEVERAGENTS_DEFAULT_PROVIDER / CLEVERAGENTS_DEFAULT_MODEL, then fall back to the built-in order (openai → anthropic → google → azure → openrouter → groq → together → cohere → gemini).
Required environment variables
| Provider | Primary variables |
|---|---|
| OpenAI | OPENAI_API_KEY |
| Anthropic | ANTHROPIC_API_KEY |
GOOGLE_API_KEY or GOOGLE_GENAI_API_KEY |
|
| Azure OpenAI | AZURE_OPENAI_API_KEY plus AZURE_OPENAI_ENDPOINT/AZURE_OPENAI_DEPLOYMENT |
| OpenRouter | OPENROUTER_API_KEY (+ optional CLEVERAGENTS_OPENROUTER_ORGANIZATION for sanitized headers) |
| Gemini | GEMINI_API_KEY or GOOGLE_GEMINI_API_KEY |
| Cohere | COHERE_API_KEY |
| Groq | GROQ_API_KEY |
| Together | TOGETHER_API_KEY |
Set CLEVERAGENTS_DEFAULT_PROVIDER to pin the global provider (for example export CLEVERAGENTS_DEFAULT_PROVIDER=openai) and CLEVERAGENTS_DEFAULT_MODEL to lock in a model ID. When unset, the registry picks the first configured provider and uses its published default model such as gpt-4o for OpenAI or claude-sonnet-4-20250514 for Anthropic.
Diagnostics and testing shortcuts
agents diagnosticsprints whether the registry can see your credentials and which actor/provider is selected.agents tellandagents buildrequire--actor <name>unless a default actor is set; useagents actor set-default <name>to configure one.- Built-in actors (
<provider>/<model>) are immutable, custom actors must be namedlocal/<id>, and the default actor cannot be removed. Use--unsafewhen adding/updating configs marked unsafe; runtime only warns when invoking unsafe actors. CLEVERAGENTS_TESTING_USE_MOCK_AI=trueforces the in-repo mock provider so Behave/Robot suites never hit external APIs.- The full capability matrix (streaming, tool calls, JSON mode, etc.) is documented in
docs/reference/providers.md.