jason.woltjeandClaude Opus 5.5
11dae0c7d8
MOSAIC_CLAUDE_BIN names the claude binary by absolute path instead of finding it on PATH. scripts/bus-service.sh render|install --claude PATH writes it into the unit (default: command -v claude in the installing shell); the claude adapter, the launcher's version read and the seat session environment all use it. Mos's Q18 ask: the unit's PATH found /usr/bin/claude 2.1.259, which refuses claude-opus-5-5. Candidate: round 2 manifest 21c1ab05, round 1 (a2008d8b) rebased ontof2f2861bafter row 55 changed docs/TOOLS.md and packages/cli/README.md; the changed lines are byte-identical. Approved by Filbert (27349, 27374) and Dewey (27350, 27375). Sage's gate onf2f2861bplus the patch: cli 112, seat 27, harness 57, nine scripts/test-*.sh 0 failed, Docker on. Co-Authored-By: Claude Opus 5.5 <[email protected]>
84 lines
3.7 KiB
Markdown
84 lines
3.7 KiB
Markdown
# Mosaic runtime adapters
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An adapter is the entire harness-specific surface of the system. Everything
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upstream of an adapter — configuration, contracts, missions, tasks, run
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records — is harness-agnostic; everything inside an adapter may assume one
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specific agent runtime.
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## Contract
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An adapter lives at:
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```text
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/opt/mosaic/adapters/<name>/adapter.sh
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```
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and must be executable. The dispatcher (`/opt/mosaic/src/run-agent.sh`)
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selects it via `MOSAIC_ADAPTER` (default: `pi`) and execs it after the
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system prompt has been generated.
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**Inputs (environment):**
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| Variable | Meaning |
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| `MOSAIC_SYSTEM_PROMPT_FILE` | Absolute path to the generated system prompt (contracts + optional mission section). Read it; do not modify it. |
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| `MOSAIC_REQUEST` | The exact user request text (may contain newlines). |
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| `MOSAIC_PROVIDER` | Configured provider name. |
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| `MOSAIC_MODEL` | Configured model id. |
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Optional, adapter-specific (documented per adapter):
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| Variable | Meaning |
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| `MOSAIC_MOCK_RESPONSE` | mock only: the verbatim response to emit |
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**Outputs:**
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- `stdout`: the model response text — the only channel the orchestrator captures
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- `stderr`: diagnostics (never credentials)
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- exit `0`: success; nonzero: failure
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## Rules
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1. Adapters print ONLY the response on stdout. Status lines go to stderr.
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2. Adapters never read configuration files; the resolved settings arrive via environment.
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3. Adapters never write outside `/var/lib/mosaic`.
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4. Adding a worker adapter requires: a new directory, the contract
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implementation, and adding the name to the allowlist in
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`scripts/mosaic-config.mjs`. A managed-session adapter (below) is selected
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by the launch bundle, not by `execution.adapter`, and is not on that
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allowlist unless it also works as a worker adapter.
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## Included adapters
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- `pi` — the pinned `@earendil-works/pi-coding-agent` CLI in noninteractive
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print mode (`-p`), ambient discovery disabled, stdin detached.
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- `mock` — deterministic echo of `MOSAIC_MOCK_RESPONSE`. Test-only: never use
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it where a real model response is required.
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- `claude` — the host's `claude` CLI, for managed sessions only (below):
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`MOSAIC_CLAUDE_BIN` when set, else `claude` on `PATH`.
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Not a worker adapter: the image has no `claude`, and the adapter refuses
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without the bundle's hook and MCP files.
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## Managed sessions (slice 1 S6)
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The session runner (`packages/harness/src/runner.mjs`) runs one adapter
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call per turn on the host, as `/bin/sh <adapters/<name>/adapter.sh>` (the
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repository keeps adapters 0644; only the image sets the mode), in the
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session's workspace and its own process group. Same contract, plus:
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| Variable | Meaning |
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| `MOSAIC_WORKSPACE` | The session's workspace; the adapter runs there. |
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| `MOSAIC_SESSION_DIR` | The session's persistent directory; later turns resume the session kept there. |
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| `MOSAIC_TOOLS` | The built-in tool limit (pi names for `pi`, Claude Code names for `claude`), comma-separated. |
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| `MOSAIC_POLICY_FILE`, `MOSAIC_TOOLS_FILE` | The bundle's gate policy and typed tools. |
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| `MOSAIC_TOOL_SOCKET` | The runner's tool socket, which the typed tools call. |
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| `MOSAIC_TURN_MARKER` | `pi`: the extension writes it at `agent_end`; a pi turn that exits 0 without it failed. |
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| `MOSAIC_EXTENSIONS` | `pi` only: extension files loaded with `-e`; a missing one exits 2. |
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| `MOSAIC_CLAUDE_SETTINGS`, `MOSAIC_CLAUDE_MCP_CONFIG` | `claude` only: the bundle's gate hook and MCP server; required. |
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| `MOSAIC_CLAUDE_BIN` | `claude` only: absolute path of the CLI to run, from the host's environment (the bus unit pins it). Unset or empty runs `claude` from `PATH`; a relative path or a non-executable file exits 2. |
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The layers each adapter relies on, and what they don't cover, are in
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`packages/harness/README.md`.
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