# Milo 0.3.0

URL: /milo-cli/releases/0.3.0/
Section: releases
Description: Agent-native scaffolding and verification, Kida 0.7 templates, terminal layout filters, and contract hardening.

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> For a complete page index, fetch /milo-cli/llms.txt.

Feature release focused on agent-native CLI authoring, stricter template contracts, release stewardship, and command/MCP/schema parity hardening.

## Highlights

- **Agent-native authoring** — `milo new <name>` scaffolds a tested CLI project, and `milo verify <path>` runs import, schema, dispatch, in-process MCP, and subprocess MCP transport checks.
- **Agent repair loops** — MCP validation errors now carry structured argument and constraint context; `llms.txt` output marks required, optional, and defaulted inputs more clearly.
- **Kida 0.7 adoption** — Milo now uses `kida-templates>=0.7.0,<0.8.0`, with inline component compilation and validated template calls enabled by default.
- **Strict undefined templates** — Stock templates already satisfy strict rendering. User templates that relied on silent undefined fallbacks now raise `UndefinedError`; pass `get_env(strict_undefined=False)` to keep loose rendering.
- **Terminal layout filters** — New display-cell filters and open-rule helpers make table, frame, divider, meter, and truncation output align by rendered cell width.
- **Steward system** — Scoped `AGENTS.md` files define ownership, contract checklists, consultation triggers, and review expectations across core, docs, tests, templates, examples, site, benchmarks, and scaffold domains.

## Added

- `milo components` for listing bundled and user-defined Kida component defs, with `--json` output for tooling and `--path` for extra template directories.
- `milo.live` re-exports for `LiveRenderer`, `Spinner`, `stream_to_terminal`, and `terminal_env`.
- `function_to_schema(..., warn_missing_docs=True)` to surface undocumented typed parameters during verification.
- `form_schema()` for form introspection.
- Agent docs, testing guidance, migration recipes, example docs, and optional Markdown snippet verification.
- Silent-exception linting with explicit `# silent: <reason>` annotations.
- Output-gallery guidance, scaffolded verification coverage, terminal cleanup checks, dispatch lock edge coverage, and display-cell rendering benchmarks.

## Changed

- `get_env()` defaults to `inline_components=True` and `validate_calls=True`, and accepts `enable_capture` for static-site and capture flows.
- Gateway, registry, and saga executor pools use Kida workload-aware worker sizing.
- `pipeline_progress` and `pipeline_detail` templates include flush boundaries to encode their streaming contract.
- Documentation site navigation is reorganized around reader intent: About, Get Started, Build CLIs, Build Apps, Quality and Operations, Reference, Examples, and Applied Tutorials.
- Steward guidance now includes evidence-backed review finding format, collateral update rules, synthesis requirements, and parity-matrix expectations.
- Internal code adopts more Python 3.14 patterns, including PEP 695 type aliases, pattern matching in form key handlers, and frozen/slotted dataclasses in tests.

## Fixed

- Contract regressions found in the project-wide bugbash across command dispatch, MCP, schema generation, app runtime, flow, form, `llms.txt`, and docs.
- Context injection parity, JSON-RPC invalid-request handling, gateway progress routing, Store shutdown/listener serialization, and CLI/schema contract drift.