When the extension config omits context_markers (or sets them blank),
relying on the built-in defaults, the Bash port aborted with "malformed
config parser output" and never updated the context file, while the
Python (`or DEFAULT_*`) and PowerShell (default-initialized) ports handled
it correctly.
The config parser prints three lines (context_files JSON, marker_start,
marker_end), captured via `_raw_opts="$(...)"`. Command substitution strips
trailing newlines, so blank marker lines collapse the output to fewer than
three, tripping the `(( ${#_opts_lines[@]} < 3 ))` guard and making the
DEFAULT_START/END substitution unreachable — the exact case it was written
for.
Require only the context_files line and default the marker lines to empty
(`${_opts_lines[1]:-}` / `${_opts_lines[2]:-}`) so the existing
DEFAULT_START/END fallback fills them in. Add a parity regression test with
blank markers (it fails on the old guard and passes with the fix).
Co-authored-by: Claude Opus 4.8 <noreply@anthropic.com>
The Python port of update-agent-context reintroduced a one-level plan
scan (specs/*/plan.md) in its mtime fallback, while the Bash and
PowerShell ports search recursively (specs/**/plan.md) per the fix for
issue #3024. The three ports were therefore not in parity: for nested
scoped layouts such as specs/<scope>/<feature>/plan.md, the Python port
found no plan and omitted the plan link from the managed context section.
Switch the fallback to `(root / "specs").rglob("plan.md")` and update the
module docstring to match the documented recursive-discovery contract.
Add a parity regression test covering the nested layout (it fails on the
one-level glob and passes with the recursive scan).
Co-authored-by: Claude Opus 4.8 <noreply@anthropic.com>
* feat(extensions): port update-agent-context to Python
Ports the agent-context extension updater to a single Python script,
per #3281 and the check-prerequisites PoC pattern from #3302. The bash
version already ran its core logic through embedded Python heredocs, so
the port lifts that logic into a standalone script. Parity tests run
bash and Python side by side and compare output and resulting
context-file bytes.
Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
* fix(extensions): match bash case-insensitivity on MSYS, test unparseable config gate
Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
---------
Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
