Petri's Fabro frontend refused a bundle naming an environment it did not
declare and every MCP catalog reference, so the fixtures declared
`[environments.local]` and the server's catalogs never reached Petri.
Pin Petri at c874b86, where the frontend reads `[environments.<id>]` and
`[run.environment]` from every settings layer (bundle over project over the
host's layer, key by key), takes the environment a launch selected over the
layers, and resolves `[run.agent.mcps.<name>] id = "..."` against a catalog
the host binds. The server hands Petri its environment catalog as
`[environments.<id>]` tables of the settings layer it already passes, the
intent's environment as the launch's selection (`Launch::environment`, as
the intent overrides the bundle in Fabro's own resolution), and its MCP
catalog as `RuntimeSpec::mcp_catalog_toml`, one inline entry per definition
keyed by id. Offline validation hands Petri the seeded catalog the same
way, so `fabro validate` accepts `[run.environment] id = "local"`.
The fixtures drop the `[environments.local]` tables they carried for this;
the secrets test keeps its own, on purpose. Scenario tests cover a bundle
naming a catalog environment (its image lowered, and run on Docker when the
plugin and a daemon are there), a bundle's own table winning key by key,
the server refusing an unknown environment before Petri, and a catalog MCP
reference whose tool the agent session lists (an echo server under
`test/mcp/`).
Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>