25e86963f3
The empty-providers fallback in `_resolve_provider` was load-bearing when `_load_providers` could return an empty tuple, but after PR #22's per-entry hardening every return path yields a non-empty registry (builtins on parse failure, the parsed list otherwise). The leftover `_normalize_provider({})` branch became dead and outright broken: with the stricter `_normalize_provider` rejecting nameless entries, the fallback now returns None and would crash setup() on `provider["auth_mode"]` the moment anything called `_resolve_provider` with an empty tuple. Replace the dead branch with an explicit ValueError + pre-condition docstring. Defensive — no production caller can hit this — but turns a future silent NoneType crash into an actionable error. Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
523 lines
23 KiB
Python
523 lines
23 KiB
Python
"""Claude Code adapter — wraps the Claude Code CLI as an agent runtime."""
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import json
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import os
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import logging
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from pathlib import Path
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from urllib.parse import urlparse
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from molecule_runtime.adapters.base import BaseAdapter, AdapterConfig, RuntimeCapabilities
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from a2a.server.agent_execution import AgentExecutor
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logger = logging.getLogger(__name__)
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# Cap one transcript response at 1000 lines so a paranoid client can't OOM
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# the workspace by polling /transcript?limit=999999.
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_TRANSCRIPT_MAX_LIMIT = 1000
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# Auth-mode constants — provider entries use one of these strings.
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# Drives validation behavior in setup() (third-party requires base_url
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# resolution; oauth/anthropic-api leave base_url=None for CLI defaults).
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_AUTH_MODE_OAUTH = "oauth"
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_AUTH_MODE_ANTHROPIC_API = "anthropic_api"
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_AUTH_MODE_THIRD_PARTY = "third_party_anthropic_compat"
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# Built-in provider registry — used as a fallback when /configs/config.yaml
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# doesn't define `providers:`. The canonical registry is the YAML file: it
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# becomes the single source of truth read by both this adapter (for boot-time
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# routing) and the canvas Config tab (Provider dropdown). Adding a new
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# provider should be a one-line YAML edit, not a code change. This builtin
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# exists so a workspace with a malformed/missing config.yaml still boots
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# with sensible defaults instead of failing.
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_BUILTIN_PROVIDERS = (
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{
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"name": "anthropic-oauth",
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"auth_mode": _AUTH_MODE_OAUTH,
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"model_prefixes": (),
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"model_aliases": ("sonnet", "opus", "haiku"),
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"base_url": None,
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"auth_env": ("CLAUDE_CODE_OAUTH_TOKEN",),
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},
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{
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"name": "anthropic-api",
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"auth_mode": _AUTH_MODE_ANTHROPIC_API,
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"model_prefixes": ("claude-",),
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"model_aliases": (),
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"base_url": None,
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"auth_env": ("ANTHROPIC_API_KEY", "ANTHROPIC_AUTH_TOKEN"),
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},
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)
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def _coerce_string_list(value, lowercase: bool = False) -> tuple:
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"""Defensively coerce a YAML field expected to be a list-of-strings.
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Operator typos in config.yaml come in two shapes that both used to
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silently produce wrong routing:
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1. forgot brackets: ``model_prefixes: mimo-`` (string, not list)
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2. mixed types: ``model_prefixes: [mimo-, 123]`` (int slips in)
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Case 1 used to iterate over characters → ``('m','i','m','o','-')``,
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making the entry match every model whose id starts with any of those
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letters. Case 2 raised AttributeError mid-comprehension, killing the
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whole registry build and silently falling back to builtins-only —
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exactly the silent-fallback failure mode this PR was meant to fix.
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Returns an empty tuple for any non-list (treated as "no entries");
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drops non-string items in the list with a warning.
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``lowercase`` controls case-folding: True for case-insensitive
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comparisons (model_prefixes, model_aliases — operators write
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``MiniMax-M2`` in YAML, model id arrives lowercased downstream),
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False to preserve case (auth_env — env var names are
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case-sensitive: ``CLAUDE_CODE_OAUTH_TOKEN`` ≠
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``claude_code_oauth_token``).
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"""
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if not isinstance(value, list):
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return ()
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out = []
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for item in value:
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if not isinstance(item, str):
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logger.warning(
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"providers: skipping non-string list item %r (type %s)",
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item, type(item).__name__,
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)
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continue
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out.append(item.lower() if lowercase else item)
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return tuple(out)
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def _normalize_provider(entry: dict):
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"""Coerce a YAML-loaded provider dict into the shape adapter logic expects.
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YAML gives us lists (not tuples) and may omit optional keys. Normalize
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to the union of all fields so downstream lookups work without scattered
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.get(...) calls. Returns ``None`` for entries that can't be salvaged
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(e.g. missing name) so the caller can drop them without poisoning the
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rest of the registry.
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"""
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if not isinstance(entry, dict):
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return None
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name = entry.get("name")
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if not name or not isinstance(name, str):
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logger.warning("providers: skipping entry without a string name: %r", entry)
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return None
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return {
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"name": name,
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"auth_mode": entry.get("auth_mode") or _AUTH_MODE_OAUTH,
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"model_prefixes": _coerce_string_list(entry.get("model_prefixes"), lowercase=True),
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"model_aliases": _coerce_string_list(entry.get("model_aliases"), lowercase=True),
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"base_url": entry.get("base_url") or None,
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"auth_env": _coerce_string_list(entry.get("auth_env"), lowercase=False),
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}
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def _load_providers(config_path: str) -> tuple:
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"""Load the provider registry from /configs/config.yaml.
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The YAML's top-level ``providers:`` list is the canonical source —
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canvas Config tab reads the same list to populate its Provider
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dropdown so the UI and the adapter never disagree on what's
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available. Falls back to ``_BUILTIN_PROVIDERS`` (oauth + anthropic-api)
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if the file is missing, malformed, or has no providers section, so a
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bare-bones workspace still boots with the historical defaults.
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Per-entry isolation: a single bad provider entry is dropped with a
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warning; the rest of the registry survives. Used to be a generator
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inside tuple(...) that propagated any AttributeError out and reverted
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the whole registry to builtins — exactly the silent-fallback failure
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mode this file's existence was meant to fix.
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"""
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yaml_path = os.path.join(config_path, "config.yaml")
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try:
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import yaml # transitive dep via molecule-ai-workspace-runtime
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with open(yaml_path, "r") as f:
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data = yaml.safe_load(f) or {}
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except FileNotFoundError:
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logger.info("providers: %s not found, using builtin defaults", yaml_path)
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return _BUILTIN_PROVIDERS
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except Exception as exc: # noqa: BLE001 — defensive: never block boot on YAML
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logger.warning("providers: failed to load from %s (%s); using builtins", yaml_path, exc)
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return _BUILTIN_PROVIDERS
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raw = data.get("providers") if isinstance(data, dict) else None
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if not isinstance(raw, list) or not raw:
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return _BUILTIN_PROVIDERS
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parsed = []
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for entry in raw:
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try:
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normalized = _normalize_provider(entry)
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except Exception as exc: # noqa: BLE001 — per-entry isolation
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logger.warning("providers: dropping unparseable entry %r (%s)", entry, exc)
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continue
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if normalized is not None:
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parsed.append(normalized)
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if not parsed:
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logger.warning("providers: no valid entries in %s; using builtins", yaml_path)
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return _BUILTIN_PROVIDERS
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return tuple(parsed)
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def _resolve_provider(model: str, providers: tuple) -> dict:
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"""Return the provider entry matching this model id.
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Match is case-insensitive: prefix wins over alias when both could
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apply. Unknown ids fall back to the first provider in the registry
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(by convention, the OAuth/safest default — anthropic-oauth in both
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_BUILTIN_PROVIDERS and the shipped config.yaml).
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Pre-condition: ``providers`` is non-empty. _load_providers always
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returns at least one entry (built-ins when YAML is missing or every
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parsed entry was rejected).
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"""
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if not providers:
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raise ValueError(
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"_resolve_provider called with empty providers tuple; "
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"_load_providers must always return at least one entry "
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"(falling back to _BUILTIN_PROVIDERS when needed)"
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)
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if not model:
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return providers[0]
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m = model.lower()
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for provider in providers:
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for prefix in provider["model_prefixes"]:
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if prefix and m.startswith(prefix):
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return provider
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for provider in providers:
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if m in provider["model_aliases"]:
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return provider
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return providers[0]
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class ClaudeCodeAdapter(BaseAdapter):
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@staticmethod
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def name() -> str:
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return "claude-code"
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@staticmethod
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def display_name() -> str:
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return "Claude Code"
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@staticmethod
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def description() -> str:
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return "Claude Code CLI — full agentic coding with hooks, CLAUDE.md, auto-memory, and MCP support"
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@staticmethod
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def get_config_schema() -> dict:
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return {
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"model": {"type": "string", "description": "Claude model (e.g. sonnet, opus, haiku)", "default": "sonnet"},
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"required_env": {"type": "array", "description": "Required env vars", "default": ["CLAUDE_CODE_OAUTH_TOKEN"]},
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"timeout": {"type": "integer", "description": "Timeout in seconds (0 = no timeout)", "default": 0},
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}
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def capabilities(self) -> RuntimeCapabilities:
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"""Claude-code SDK owns session lifecycle natively — see project
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memory `project_runtime_native_pluggable.md`.
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provides_native_session=True
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The claude-agent-sdk maintains a long-lived streaming session
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with its own ClaudeSDKClient state. The platform's a2a_queue
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would double-buffer the same in-flight state — declaring
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native_session lets the platform skip enqueueing and dispatch
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directly. Validates capability primitive #5 once that
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consumer lands.
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Other capabilities stay False (platform fallback owns them):
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- provides_native_heartbeat: the SDK's session events don't map
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cleanly to our 30s heartbeat cadence; heartbeat.py keeps
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emitting WORKSPACE_HEARTBEAT so the canvas idle indicator and
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a2a_proxy idle-timer reset behavior keep working.
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- provides_native_scheduler: claude-code has no built-in cron;
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platform scheduler keeps owning it.
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- provides_native_status_mgmt: claude-code wedge detection IS
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adapter-driven (claude_sdk_executor sets is_wedged + heartbeat
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forwards as runtime_state="wedged"), but the rest of the
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status state machine (online/degraded recovery via error_rate)
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stays platform-owned. Reconsider once the SDK exposes its own
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ready-signal hook.
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- provides_native_retry / activity_decoration / channel_dispatch:
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not implemented in the SDK surface — platform fallback applies.
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"""
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return RuntimeCapabilities(
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provides_native_session=True,
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)
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def idle_timeout_override(self) -> int:
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"""Claude-code synthesis on Opus + multi-step tool use legitimately
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runs 8-10 min between broadcaster events. The pre-capability
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bug PR #2128 patched at the env-var layer hit this exact issue:
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`context canceled` mid-flight when the platform's 5min idle
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timer fired during a long packaging step. Override to 15 min
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to cover the long tail without leaving genuinely-wedged runs
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hanging too long.
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Capability primitive #2 — see workspace/adapter_base.py:
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idle_timeout_override and PR #2139 for the platform-side
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consumer in a2a_proxy.dispatchA2A.
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"""
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return 900 # 15 minutes
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async def setup(self, config: AdapterConfig) -> None:
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"""Install plugins via the per-runtime adaptor registry.
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The legacy claude-code-specific ``inject_plugins()`` override is gone:
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each plugin now ships (or has registered in the platform registry) a
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per-runtime adaptor, and ``BaseAdapter.install_plugins_via_registry``
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routes installs through it. The Claude Code SDK still reads
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``CLAUDE.md`` and ``/configs/skills/`` natively, and the default
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:class:`AgentskillsAdaptor` writes to both.
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"""
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# Load provider registry from /configs/config.yaml — canvas reads
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# the same YAML for its Config-tab Provider dropdown so adapter +
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# UI never disagree on what's available. Adding a new provider is
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# a one-line YAML edit (no code change in this file or entrypoint.sh).
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providers = _load_providers(config.config_path)
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# Resolve the picked model to a provider entry, then drive auth-env
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# validation + ANTHROPIC_BASE_URL routing from that single decision.
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rc = config.runtime_config
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if isinstance(rc, dict):
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picked_model = rc.get("model") or "sonnet"
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else:
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picked_model = getattr(rc, "model", None) or "sonnet"
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provider = _resolve_provider(picked_model, providers)
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auth_env_options = provider["auth_env"]
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# Endpoint precedence: operator-set ANTHROPIC_BASE_URL wins (escape
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# hatch for custom regional endpoints — e.g. token-plan-sgp.* for
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# Xiaomi MiMo, api.minimaxi.com for MiniMax China). Otherwise the
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# provider's default base_url is auto-applied so the operator
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# picking a provider in the platform UI doesn't *also* have to
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# paste a URL. Anthropic-native paths (oauth, anthropic_api) leave
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# base_url=None and let the CLI's built-in default take effect.
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explicit_base_url = os.environ.get("ANTHROPIC_BASE_URL")
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if explicit_base_url:
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effective_base_url = explicit_base_url
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base_url_source = "operator-override"
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elif provider["base_url"]:
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os.environ["ANTHROPIC_BASE_URL"] = provider["base_url"]
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effective_base_url = provider["base_url"]
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base_url_source = f"provider={provider['name']}"
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else:
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effective_base_url = None
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base_url_source = "anthropic-default"
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# Boot banner — operators reading workspace logs see which provider
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# was selected, where the URL came from, and which auth env var
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# the adapter expects. Cheap diagnostic; cuts root-cause-finding
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# time when an LLM call fails downstream.
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base_url_host = ""
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if effective_base_url:
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try:
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base_url_host = urlparse(effective_base_url).netloc or "<unparseable>"
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except Exception:
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base_url_host = "<unparseable>"
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logger.info(
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"Claude Code adapter starting: model=%s provider=%s auth_mode=%s "
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"base_url=%s (%s) auth_env=%s",
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picked_model, provider["name"], provider["auth_mode"],
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base_url_host or "anthropic-default", base_url_source,
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"/".join(auth_env_options),
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)
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# Auth check — any of the provider's accepted env vars satisfies.
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# Warning (not raise) so a workspace can still boot for non-LLM
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# work (terminal, file editing) while the operator sets the key.
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if not any(os.environ.get(v) for v in auth_env_options):
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logger.warning(
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"None of %s set for model=%s (provider=%s) — the adapter "
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"will fail on the first LLM call with AuthenticationError. "
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"Set one of these env vars in workspace secrets.",
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"/".join(auth_env_options), picked_model, provider["name"],
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)
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# Third-party providers must end up with a base_url one way or
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# another (provider default OR operator override). If neither, the
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# CLI silently hits api.anthropic.com with a non-Anthropic key and
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# every call 401s — workspace looks "online" but is structurally
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# broken. Symmetric with create_executor's pre-validate raise on
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# the inverse misconfig. The provider registry guarantees a default
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# for every third-party we ship, so this fires only if a future
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# provider entry forgets to set base_url.
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if (provider["auth_mode"] == _AUTH_MODE_THIRD_PARTY
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and not effective_base_url):
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raise ValueError(
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f"claude-code adapter: model={picked_model} resolved to "
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f"third-party provider={provider['name']} but no "
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"ANTHROPIC_BASE_URL is configured (provider has no default "
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"and operator didn't set one). Add base_url to the provider "
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"entry in adapter.py or set ANTHROPIC_BASE_URL via secrets."
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)
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from molecule_runtime.plugins import load_plugins
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workspace_plugins_dir = os.path.join(config.config_path, "plugins")
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plugins = load_plugins(
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workspace_plugins_dir=workspace_plugins_dir,
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shared_plugins_dir=os.environ.get("PLUGINS_DIR", "/plugins"),
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)
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await self.install_plugins_via_registry(config, plugins)
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async def create_executor(self, config: AdapterConfig) -> AgentExecutor:
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from claude_sdk_executor import ClaudeSDKExecutor
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# Load system prompt if exists
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system_prompt = config.system_prompt
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if not system_prompt:
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prompt_file = os.path.join(config.config_path, "system-prompt.md")
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if os.path.exists(prompt_file):
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with open(prompt_file) as f:
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system_prompt = f.read()
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# runtime_config may arrive as a dict (from main.py vars(...)) or as a
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# RuntimeConfig dataclass. Read `model` defensively from either shape.
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rc = config.runtime_config
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if isinstance(rc, dict):
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explicit_model = rc.get("model") or ""
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else:
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explicit_model = getattr(rc, "model", None) or ""
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# Pre-validation: detect the misconfiguration combo that drove the
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# 2026-04-30 staging incident — ANTHROPIC_BASE_URL pointed at a
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# non-Anthropic upstream (MiniMax / OpenAI shim) but no explicit
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# model was set, so we'd silently fall back to "sonnet" and the
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# upstream would hang on the SDK --print probe for 30s before
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# timing out. The platform's phantom-busy sweep then resets the
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# workspace at the 10min mark — the user-visible failure is "every
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# workspace dead" but the root cause is one missing env var.
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#
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# Fail fast here with an actionable message so the operator sees
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# exactly what to fix instead of chasing ghosts in workspace logs.
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# We only fire when ALL three are true:
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# 1. ANTHROPIC_BASE_URL is set (custom upstream is in play)
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# 2. The host is NOT api.anthropic.com (real Anthropic accepts
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# "sonnet" as a known alias, so the fallback is fine there)
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# 3. The user did NOT set an explicit model (the check we want)
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# Anthropic-native users with no model picked still get the
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# "sonnet" fallback — that's correct behavior, no error.
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base_url = os.environ.get("ANTHROPIC_BASE_URL", "").strip()
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if base_url and not explicit_model:
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host = urlparse(base_url).hostname or ""
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if host and host != "api.anthropic.com":
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raise ValueError(
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"claude-code adapter: ANTHROPIC_BASE_URL points at a "
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f"non-Anthropic host ({host}) but no model is configured. "
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"The default fallback ('sonnet') is an Anthropic-native "
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"alias; non-Anthropic shims (MiniMax, OpenAI gateways, "
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"etc.) won't recognize it and the SDK --print probe will "
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"hang for 30s before timing out. Fix: set MODEL_PROVIDER "
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"as a workspace secret (canvas: Save+Restart with model "
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"picked) or set runtime_config.model in /configs/config.yaml."
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)
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model = explicit_model or "sonnet"
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# Surface what we resolved to in logs — when the workspace agent
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# eventually fails, this single line in the logs explains "the
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# adapter sent X to Y" without having to dig into the SDK
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# subprocess. Cheap diagnostic, no runtime cost.
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if base_url:
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logger.info(
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"claude-code: model=%s base_url_host=%s (custom upstream)",
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model,
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urlparse(base_url).hostname or "<unparseable>",
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)
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else:
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logger.info("claude-code: model=%s base_url=anthropic-default", model)
|
|
|
|
return ClaudeSDKExecutor(
|
|
system_prompt=system_prompt,
|
|
config_path=config.config_path,
|
|
heartbeat=config.heartbeat,
|
|
model=model,
|
|
)
|
|
|
|
async def transcript_lines(self, since: int = 0, limit: int = 100) -> dict:
|
|
"""Read the live Claude Code session transcript.
|
|
|
|
Claude Code writes every session to
|
|
``$HOME/.claude/projects/<cwd-as-dirname>/<session-uuid>.jsonl`` —
|
|
every line is a JSON event (user/assistant/tool_use/attachment/etc).
|
|
We pick the most-recently-modified .jsonl in the projects dir for
|
|
the agent's working directory, then return ``[since:since+limit]``.
|
|
|
|
Returns ``supported: True`` even if no .jsonl exists yet (empty
|
|
``lines`` + ``cursor=0``) so the canvas can show "agent hasn't
|
|
produced output yet" instead of "feature unavailable".
|
|
"""
|
|
limit = max(1, min(limit, _TRANSCRIPT_MAX_LIMIT))
|
|
since = max(0, since)
|
|
|
|
# Resolve the projects-dir name. Claude Code maps cwd → dirname by
|
|
# replacing "/" with "-" (so "/configs" → "-configs"). The exact
|
|
# rule lives inside the CLI binary, but the leading-dash + path-
|
|
# without-trailing-slash pattern is stable across versions.
|
|
#
|
|
# Match ClaudeSDKExecutor._resolve_cwd: prefer /workspace if populated,
|
|
# else /configs. Override via CLAUDE_PROJECT_CWD for tests.
|
|
WORKSPACE_MOUNT = "/workspace"
|
|
CONFIG_MOUNT = "/configs"
|
|
cwd_override = os.environ.get("CLAUDE_PROJECT_CWD")
|
|
if cwd_override:
|
|
cwd = cwd_override
|
|
elif os.path.isdir(WORKSPACE_MOUNT) and os.listdir(WORKSPACE_MOUNT):
|
|
cwd = WORKSPACE_MOUNT
|
|
else:
|
|
cwd = CONFIG_MOUNT
|
|
|
|
# Normalize: strip trailing slash, replace path separators with "-"
|
|
cwd_norm = cwd.rstrip("/") or "/"
|
|
projdir_name = cwd_norm.replace("/", "-") # "/configs" → "-configs"
|
|
|
|
home = Path(os.environ.get("HOME", "/home/agent"))
|
|
projdir = home / ".claude" / "projects" / projdir_name
|
|
result_base = {
|
|
"runtime": self.name(),
|
|
"supported": True,
|
|
"lines": [],
|
|
"cursor": since,
|
|
"more": False,
|
|
"source": str(projdir),
|
|
}
|
|
|
|
if not projdir.is_dir():
|
|
return result_base
|
|
|
|
# Pick most-recently-modified .jsonl
|
|
candidates = sorted(projdir.glob("*.jsonl"), key=lambda p: p.stat().st_mtime, reverse=True)
|
|
if not candidates:
|
|
return result_base
|
|
target = candidates[0]
|
|
result_base["source"] = str(target)
|
|
|
|
lines = []
|
|
more = False
|
|
try:
|
|
with target.open("r") as f:
|
|
for i, raw in enumerate(f):
|
|
if i < since:
|
|
continue
|
|
if len(lines) >= limit:
|
|
more = True
|
|
break
|
|
raw = raw.strip()
|
|
if not raw:
|
|
continue
|
|
try:
|
|
lines.append(json.loads(raw))
|
|
except json.JSONDecodeError:
|
|
# Skip malformed lines but keep cursor advancing
|
|
lines.append({"_parse_error": True, "_raw": raw[:200]})
|
|
except OSError as exc:
|
|
logger.warning("transcript_lines: read failed for %s: %s", target, exc)
|
|
return result_base
|
|
|
|
result_base["lines"] = lines
|
|
result_base["cursor"] = since + len(lines)
|
|
result_base["more"] = more
|
|
return result_base
|
|
|
|
|
|
Adapter = ClaudeCodeAdapter
|