v1.89.1.0 fix: remove continuous checkpoint commits (#2970)

* v1.89.1.0 fix: remove continuous checkpoint commits and repair validation blockers

* fix: clarify shipping and engineering review recovery

* fix: interpret native no-change review descriptions

* test: separate descendant readiness from timeout delivery

bin/gstack-config

@@ -62,16 +62,6 @@ CONFIG_HEADER='# gstack configuration — edit freely, changes take effect on ne
 # skill_prefix: false       # true = namespace skills as /gstack-qa, /gstack-ship
 #                           # false = short names /qa, /ship
 #
-# ─── Checkpoint ──────────────────────────────────────────────────────
-# checkpoint_mode: explicit # explicit | continuous
-#                           #   explicit   — commit only when you run /ship or /checkpoint
-#                           #   continuous — auto-commit after each significant change
-#                           #                with WIP: prefix + [gstack-context] body
-#
-# checkpoint_push: false    # true = push WIP commits to remote as you go
-#                           # false = keep WIP commits local only (default)
-#                           # Pushing can trigger CI/deploy hooks — opt in carefully.
-#
 # ─── Writing style (V1) ──────────────────────────────────────────────
 # explain_level: default    # default = jargon-glossed, outcome-framed prose
 #                           #           (V1 default — more accessible for everyone)
@@ -165,8 +155,6 @@ lookup_default() {
     auto_upgrade) echo "false" ;;
     update_check) echo "true" ;;
     skill_prefix) echo "false" ;;
-    checkpoint_mode) echo "explicit" ;;
-    checkpoint_push) echo "false" ;;
     explain_level) echo "default" ;;
     codex_reviews) echo "enabled" ;;
     design_detector) echo "auto" ;; # auto | off — impeccable engine pre-pass in the design skills
@@ -495,7 +483,7 @@ case "${1:-}" in
     echo ""
     echo "# ─── Active values (including defaults for unset keys) ───"
     for KEY in proactive routing_declined telemetry auto_upgrade update_check \
-               skill_prefix checkpoint_mode checkpoint_push explain_level \
+               skill_prefix explain_level \
                codex_reviews gstack_contributor skip_eng_review workspace_root \
                artifacts_sync_mode artifacts_sync_mode_prompted plan_tune_hooks \
                timeline_stop_hook design_detector design_detector_install_prompted memorable_recall; do
@@ -512,7 +500,7 @@ case "${1:-}" in
   defaults)
     echo "# gstack-config defaults"
     for KEY in proactive routing_declined telemetry auto_upgrade update_check \
-               skill_prefix checkpoint_mode checkpoint_push explain_level \
+               skill_prefix explain_level \
                codex_reviews gstack_contributor skip_eng_review workspace_root \
                artifacts_sync_mode artifacts_sync_mode_prompted plan_tune_hooks \
                timeline_stop_hook design_detector design_detector_install_prompted memorable_recall; do

bin/gstack-skill-start

@@ -195,10 +195,6 @@ if [ -d ".claude/skills/gstack" ] && [ ! -L ".claude/skills/gstack" ]; then
 fi
 echo "VENDORED_GSTACK: $_VENDORED"
 echo "MODEL_OVERLAY: $MODEL_OVERLAY"
-_CHECKPOINT_MODE=$("$_BIN/gstack-config" get checkpoint_mode 2>/dev/null || echo "explicit")
-_CHECKPOINT_PUSH=$("$_BIN/gstack-config" get checkpoint_push 2>/dev/null || echo "false")
-echo "CHECKPOINT_MODE: $_CHECKPOINT_MODE"
-echo "CHECKPOINT_PUSH: $_CHECKPOINT_PUSH"
 # Plan-mode hint for skills that branch on plan-mode state. Detected best-effort
 # from CLAUDE_PLAN_FILE (set by the harness when plan mode is active); "inactive"
 # is the safe default (file+execute pipeline).
@@ -365,11 +361,7 @@ fi
 # Feature discovery (one prompt per session, marker-gated). These are
 # machine-local UX acknowledgements, so keep them in GSTACK_HOME rather than
 # beside an install path that may resolve through a project-local symlink.
-if [ ! -f "$_GH/.feature-prompted-continuous-checkpoint" ]; then
-  _emit_block feature-checkpoint <<EOI
-Feature discovery: AskUserQuestion for Continuous checkpoint auto-commits. If accepted, run \`$_BIN/gstack-config set checkpoint_mode continuous\`. Always run: \`touch "$_GH/.feature-prompted-continuous-checkpoint"\`.
-EOI
-elif [ ! -f "$_GH/.feature-prompted-model-overlay" ]; then
+if [ ! -f "$_GH/.feature-prompted-model-overlay" ]; then
   _emit_block feature-overlay <<EOI
 Feature discovery: inform "Model overlays are active. MODEL_OVERLAY shows the patch." Always run: \`touch "$_GH/.feature-prompted-model-overlay"\`.
 EOI