Prerequisite for the universal-runtime refactor (task #87) to move
claude_sdk_executor.py out of molecule-runtime into the claude-code
template repo. heartbeat.py had a hard import:
from claude_sdk_executor import is_wedged, wedge_reason
which would break the moment the executor moves out of the runtime
package — the heartbeat would lose access to the wedge state used to
flip workspace status to degraded.
Extract the wedge state to a runtime-side module that the heartbeat
can keep importing regardless of which adapter executor is wedged:
- workspace/runtime_wedge.py — single-flag state + mark_wedged /
clear_wedge / is_wedged / wedge_reason / reset_for_test. Same
semantics as the original claude_sdk_executor implementation
(sticky first-write-wins, auto-clear on observed success). 100
LOC of pure stateless helpers; lock-free ok because there's one
executor per workspace process today.
- workspace/claude_sdk_executor.py — drops the in-file definitions;
re-exports the same names from runtime_wedge as a backwards-compat
shim. Any third-party adapter that imported is_wedged / wedge_reason
/ _mark_sdk_wedged from claude_sdk_executor keeps working for one
release cycle while they migrate to runtime_wedge.
- workspace/heartbeat.py — _runtime_state_payload() now imports
from runtime_wedge instead of claude_sdk_executor. Lazy-import
pattern preserved; the docstring updated to explain the new
cross-cutting source-of-truth.
Tests (10 new in test_runtime_wedge.py):
- Default state (unwedged), mark sets flag, first-write-wins,
clear restores healthy, clear-when-not-wedged is no-op,
re-marking after clear is allowed
- Re-export shim: each old name in claude_sdk_executor IS the
runtime_wedge function (identity check), state is shared
(marking via the executor shim is observable via runtime_wedge
and vice versa)
Verification:
- 1251/1251 workspace pytest pass (was 1241 after orphan deletion;
+10 = exactly the new test_runtime_wedge.py cases)
- All existing test_claude_sdk_executor.py cases (which call
_mark_sdk_wedged via the shim) still pass
After this lands + the claude-code template image rebuilds with the
local claude_sdk_executor.py copy (template PR #13), the molecule-
core deletion of workspace/claude_sdk_executor.py becomes safe (the
shim deletion comes alongside the file deletion, since runtime_wedge
is the new public API).
See project memory `project_runtime_native_pluggable.md`.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
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