fix(#373): replace unquoted $GSD_SDK with space-safe gsd_run launcher (#379)

* fix(#373): replace unquoted $GSD_SDK with space-safe gsd_run launcher

Workflow bash blocks resolved the runtime as GSD_SDK="node $GSD_TOOLS" and
invoked it unquoted ($GSD_SDK query ...). On install paths containing spaces
(e.g. /Volumes/Mini Me/...) the unquoted expansion word-split into
`node /Volumes/Mini gsd-tools.cjs ...`, failing with "Cannot find module
'/Volumes/Mini'" and getting masked by `2>/dev/null || echo "{}"` into a
silent empty state.

Replace the string variable with a single-line shell launcher that defines a
gsd_run function, invokes the runtime with a fully-quoted path and "$@", and
preserves the local-cjs / installed-gsd-tools-on-PATH fallback (#3668) plus
the loud not-found error and install hint. The launcher uses _GSD_SHIM_NAME
indirection so no workflow emits the /gsd-tools substring that the do.md
dispatcher-parity scanner would misread, and is single-line to stay within
the per-file progressive-disclosure line budgets (#2551).

The canonical launcher lives in
get-shit-done/workflows/_runtime-launcher.snippet.sh, is propagated once per
file by scripts/sync-runtime-launcher.cjs, and is locked by
tests/runtime-launcher-parity.test.cjs (fails CI on drift, on a reappearing
$GSD_SDK token, or on a /gsd-tools substring). Dependent workflow-assertion
tests are updated from $GSD_SDK to gsd_run, and the runtime launcher is
registered in CONTEXT.md.

Fixes #373

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

* ci(#373): add changeset fragment and allow-test-rule for parity guard

The runtime-launcher parity test is a structural drift guard that reads
workflow markdown to assert the canonical launcher is present and the
retired $GSD_SDK / /gsd-tools tokens are absent; annotate it with
allow-test-rule per the no-source-grep lint escape hatch. Add the required
.changeset fragment for this user-facing fix.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

* test(#373): make parity PATH-fallback assertion cross-platform (Windows)

Subtest (E) compared GSD_TOOLS against the Node-side absolute temp path,
but the value originates from git-bash which reports the POSIX form, so the
prefix comparison failed on windows-latest while the launcher itself worked
(the installed stub was invoked). Assert the resolved binary by normalized
suffix (/bin/gsd-tools, not .cjs) instead of the absolute prefix; the
behavioral stub-invocation assertion is unchanged.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

---------

Co-authored-by: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

package.json

@@ -54,6 +54,7 @@
     "fallow": "^2.70.0"
   },
   "scripts": {
+    "sync:launcher": "node scripts/sync-runtime-launcher.cjs",
     "check:env": "bash scripts/check-env.sh",
     "check:alias-drift": "node scripts/check-alias-drift.cjs",
     "check:integrity": "./scripts/check-npm-integrity.sh",