fix(fleet): always bake runtime-bin into pane PATH (ignore launcher PATH)

The previous `_build_runtime_bin_prefix()` skipped candidate dirs that
were already present in the LAUNCHER process's \$PATH.  This is wrong:
the tmux pane inherits the tmux SERVER environment, not the launcher's
env.  A dir on the launcher's \$PATH may be absent from the server env,
so the prefix could come back empty and the pane would fail with
'command not found'.

Remove the `case ":${PATH}:"` check that tested against the live launcher
PATH.  Keep the existence check (`[ -d "$dir" ]`) and the dedup-within-
the-constructed-prefix guard.  The pane command's `export PATH="<prefix>:${PATH}"`
harmlessly absorbs any overlap with the server PATH.

Add test 5 to test-start-agent-session.sh: sets FAKE_RUNTIME_BIN5 on the
launcher's \$PATH and asserts it still appears in the generated pane PATH
export — directly guarding this regression.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01RMoEx7hfdFGjUiCHuN1RRi

packages/mosaic/framework/defaults/AGENTS.md

@@ -70,9 +70,6 @@ Skills, hooks, MCP, and plugins are force multipliers you MUST use when applicab
 ## Missing core file
 
 If `CONSTITUTION.md`, `AGENTS.md`, `SOUL.md`, or the runtime contract is missing, stop and report it.
-This agent-facing strictness is intentional and stricter than the launcher: the launcher injects
-`CONSTITUTION.md` tolerantly (skipping it if absent so pre-upgrade hosts keep working), but once a host
-is re-seeded a genuinely missing core file is a stop-and-report condition — not something to proceed past.
 
 ## Session Closure
 

packages/mosaic/framework/defaults/CONSTITUTION.md

@@ -2,11 +2,8 @@
 
 The irreducible, non-negotiable law for every Mosaic agent on every harness.
 
-**Framework-owned.** This file is overwritten verbatim on every upgrade — do not edit it. There is
+**Framework-owned.** This file is overwritten verbatim on every upgrade — do not edit it. To change
-**no `CONSTITUTION.local.md`**: hard gates are not locally overridable. A lower layer may only make
+behavior, add a `.local.md` overlay or a `policy/` file (tighten-only; see `constitution/LAYER-MODEL.md`).
-behavior _stricter_, never relax or override a gate (see Precedence). Operator customization lives in
-other layers — `SOUL.md` / `USER.md` and the tighten-only overlays `STANDARDS.local.md` /
-`SOUL.local.md` / `USER.local.md` / `policy/*.md` (see `constitution/LAYER-MODEL.md`).
 Authored in **capability verbs**: where a gate names a capability ("structured reasoning", "queue
 guard"), the runtime adapter binds it to a concrete tool and states whether absence is a hard stop.
 

packages/mosaic/framework/install.sh

@@ -21,19 +21,11 @@ INSTALL_MODE="${MOSAIC_INSTALL_MODE:-prompt}"
 
 # Files/dirs preserved across upgrades (never overwritten).
 # User-created content in these paths survives rsync --delete.
-PRESERVE_PATHS=("CONSTITUTION.md" "AGENTS.md" "SOUL.md" "USER.md" "TOOLS.md" "STANDARDS.md" "memory" "sources" "credentials")
+PRESERVE_PATHS=("AGENTS.md" "SOUL.md" "USER.md" "TOOLS.md" "STANDARDS.md" "memory" "sources" "credentials")
-
-# Framework-owned contract files: re-copied from defaults/ on every upgrade (the
-# user must not edit them; a divergent copy is backed up once before overwrite).
-# USER_SEEDED files are written once on first install, then owned by the user.
-# Both lists are APPEND-FRIENDLY — add a new shipped framework file here and to the
-# matching list in packages/mosaic/src/config/file-adapter.ts.
-FRAMEWORK_OWNED=("CONSTITUTION.md" "AGENTS.md" "STANDARDS.md")
-USER_SEEDED=("TOOLS.md")
 
 # Current framework schema version — bump this when the layout changes.
 # The migration system uses this to run upgrade steps.
-FRAMEWORK_VERSION=3
+FRAMEWORK_VERSION=2
 
 # ─── colours ──────────────────────────────────────────────────────────────────
 if [[ -t 1 ]]; then
@@ -48,45 +40,6 @@ warn() { echo -e "  ${YELLOW}⚠${RESET} $1" >&2; }
 fail() { echo -e "  ${RED}✗${RESET} $1" >&2; }
 step() { echo -e "\n${BOLD}$1${RESET}"; }
 
-# ─── snapshot / restore (crash safety for upgrades) ──────────────────────────
-SNAPSHOT_DIR=""
-make_snapshot() {
-  is_existing_install || return 0
-  SNAPSHOT_DIR="$(mktemp -d "${TMPDIR:-/tmp}/mosaic-snapshot-XXXXXX")"
-  cp -a "$TARGET_DIR/." "$SNAPSHOT_DIR/" 2>/dev/null || true
-}
-restore_snapshot() {
-  [[ -n "$SNAPSHOT_DIR" && -d "$SNAPSHOT_DIR" ]] || return 0
-  fail "Install interrupted/failed — restoring previous state from snapshot"
-  rm -rf "$TARGET_DIR"; mkdir -p "$TARGET_DIR"
-  cp -a "$SNAPSHOT_DIR/." "$TARGET_DIR/" 2>/dev/null || true
-}
-cleanup_snapshot() { [[ -n "$SNAPSHOT_DIR" && -d "$SNAPSHOT_DIR" ]] && rm -rf "$SNAPSHOT_DIR"; SNAPSHOT_DIR=""; }
-
-# Reconcile contract files after sync: framework-owned overwrite (backup-once),
-# user-seeded seed-if-absent.
-reconcile_framework_files() {
-  local defaults="$TARGET_DIR/defaults" f
-  [[ -d "$defaults" ]] || return 0
-  for f in "${FRAMEWORK_OWNED[@]}"; do
-    [[ -f "$defaults/$f" ]] || continue
-    if [[ -f "$TARGET_DIR/$f" ]] && ! cmp -s "$TARGET_DIR/$f" "$defaults/$f"; then
-      if [[ ! -f "$TARGET_DIR/${f}.pre-constitution.bak" ]]; then
-        cp "$TARGET_DIR/$f" "$TARGET_DIR/${f}.pre-constitution.bak"
-        warn "$f is now framework-owned and was updated; your previous copy is saved as ${f}.pre-constitution.bak — re-apply intended changes as a .local overlay or policy/ file (see CONSTITUTION.md / constitution/LAYER-MODEL.md)."
-      fi
-    fi
-    cp "$defaults/$f" "$TARGET_DIR/$f"
-  done
-  for f in "${USER_SEEDED[@]}"; do
-    [[ -f "$defaults/$f" ]] || continue
-    if [[ ! -f "$TARGET_DIR/$f" ]]; then
-      cp "$defaults/$f" "$TARGET_DIR/$f"
-      ok "Seeded $f from defaults"
-    fi
-  done
-}
-
 # ─── helpers ──────────────────────────────────────────────────────────────────
 
 is_existing_install() {
@@ -160,14 +113,11 @@ sync_framework() {
   fi
 
   if command -v rsync >/dev/null 2>&1; then
-    local rsync_args=(-a --delete --exclude ".git" --exclude ".framework-version" --exclude "*.pre-constitution.bak")
+    local rsync_args=(-a --delete --exclude ".git" --exclude ".framework-version")
 
     if [[ "$INSTALL_MODE" == "keep" ]]; then
-      # Anchor to the transfer root (leading /) so we preserve the TOP-LEVEL
-      # ~/.config/mosaic/<file> without also excluding defaults/<file> from sync
-      # (reconcile_framework_files needs the freshly-synced defaults/ copies).
       for path in "${PRESERVE_PATHS[@]}"; do
-        rsync_args+=(--exclude "/$path")
+        rsync_args+=(--exclude "$path")
       done
     fi
 
@@ -187,7 +137,7 @@ sync_framework() {
     done
   fi
 
-  find "$TARGET_DIR" -mindepth 1 -maxdepth 1 ! -name ".git" ! -name ".framework-version" ! -name "*.pre-constitution.bak" -exec rm -rf {} +
+  find "$TARGET_DIR" -mindepth 1 -maxdepth 1 ! -name ".git" ! -name ".framework-version" -exec rm -rf {} +
   cp -R "$SOURCE_DIR"/. "$TARGET_DIR"/
   rm -rf "$TARGET_DIR/.git"
 
@@ -245,15 +195,10 @@ run_migrations() {
     fi
   fi
 
-  # ── Migration: v2 → v3 (Constitution split) ───────────────────────────────
+  # ── Future migrations go here ──────────────────────────────────────────────
-  # CONSTITUTION.md / AGENTS.md / STANDARDS.md become framework-owned (overwritten
+  # if [[ "$from_version" -lt 3 ]]; then
-  # on upgrade). reconcile_framework_files() has already run before this point: it
+  #   ...
-  # backed up any user-edited copy to <file>.pre-constitution.bak and installed the
+  # fi
-  # new framework version. Nothing further to do here — the advisory was emitted at
-  # reconcile time. (STANDARDS.local.md composition lands with the overlay composer.)
-  if [[ "$from_version" -lt 3 ]]; then
-    ok "Migrated to the Constitution layout (framework-owned CONSTITUTION/AGENTS/STANDARDS)"
-  fi
 }
 
 # ═══════════════════════════════════════════════════════════════════════════════
@@ -271,10 +216,6 @@ else
   ok "Install mode: overwrite"
 fi
 
-# Snapshot before any destructive file operation; restore on interrupt/failure.
-make_snapshot
-trap 'restore_snapshot' ERR INT TERM
-
 sync_framework
 
 # Ensure persistent directories exist
@@ -289,7 +230,15 @@ mkdir -p "$TARGET_DIR/credentials"
 # packages/mosaic/src/config/file-adapter.ts (FileConfigAdapter.syncFramework).
 # SOUL.md and USER.md are intentionally NOT seeded here — they are generated
 # by `mosaic init` from templates with user-supplied values.
-reconcile_framework_files
+DEFAULTS_DIR="$TARGET_DIR/defaults"
+if [[ -d "$DEFAULTS_DIR" ]]; then
+  for default_file in CONSTITUTION.md AGENTS.md STANDARDS.md TOOLS.md; do
+    if [[ -f "$DEFAULTS_DIR/$default_file" ]] && [[ ! -f "$TARGET_DIR/$default_file" ]]; then
+      cp "$DEFAULTS_DIR/$default_file" "$TARGET_DIR/$default_file"
+      ok "Seeded $default_file from defaults"
+    fi
+  done
+fi
 
 # Ensure tool scripts are executable
 find "$TARGET_DIR/tools" -name "*.sh" -exec chmod +x {} + 2>/dev/null || true
@@ -300,18 +249,6 @@ ok "Framework synced to $TARGET_DIR"
 # Run migrations before post-install (migrations may remove old bin/ etc.)
 run_migrations
 
-# File-system phase complete and consistent — clear the restore trap.
-trap - ERR INT TERM
-cleanup_snapshot
-
-# Testability / minimal-install hook: stop after the file-system phase, before any
-# environment-touching post-install steps (runtime linking, MCP setup, skills, doctor).
-if [[ "${MOSAIC_SYNC_ONLY:-0}" == "1" ]]; then
-  write_framework_version
-  ok "Sync-only mode: file phase complete"
-  exit 0
-fi
-
 step "Post-install tasks"
 
 SCRIPTS="$TARGET_DIR/tools/_scripts"

packages/mosaic/framework/tools/quality/scripts/test-install-migration.sh

@@ -1,67 +0,0 @@
-#!/usr/bin/env bash
-# test-install-migration.sh — fixture matrix for the v2→v3 (Constitution) upgrade
-# migration in install.sh. Runs the installer against throwaway MOSAIC_HOME dirs
-# with MOSAIC_SYNC_ONLY=1 (file phase only — no environment-touching post-install)
-# and asserts the framework-owned-overwrite + user-preserve + backup semantics.
-#
-# Mirrors the TS fixture suite in packages/mosaic/src/config/file-adapter.test.ts;
-# both installers MUST behave identically.
-#
-# Usage:  bash test-install-migration.sh
-set -uo pipefail
-
-FW="$(cd "$(dirname "${BASH_SOURCE[0]}")/../../.." && pwd)"   # packages/mosaic/framework
-INSTALL="$FW/install.sh"
-DEFA="$FW/defaults"
-
-pass=0; fail=0
-chk() { if eval "$2"; then echo "  ✓ $1"; pass=$((pass + 1)); else echo "  ✗ $1"; fail=$((fail + 1)); fi; }
-run() { MOSAIC_HOME="$1" MOSAIC_INSTALL_MODE="$2" MOSAIC_SYNC_ONLY=1 bash "$INSTALL" >/dev/null 2>&1; }
-
-echo "install.sh v2→v3 migration fixture matrix:"
-
-# F1 — fresh install
-T1=$(mktemp -d); run "$T1" overwrite
-chk "F1 fresh: CONSTITUTION/AGENTS/STANDARDS/TOOLS seeded" \
-  "[ -f '$T1/CONSTITUTION.md' ] && [ -f '$T1/AGENTS.md' ] && [ -f '$T1/STANDARDS.md' ] && [ -f '$T1/TOOLS.md' ]"
-chk "F1 fresh: AGENTS == shipped default" "cmp -s '$T1/AGENTS.md' '$DEFA/AGENTS.md'"
-chk "F1 fresh: framework-version stamped 3" "[ \"\$(cat '$T1/.framework-version' 2>/dev/null)\" = 3 ]"
-
-# F2 — legacy install with a user-edited AGENTS.md (the sanctioned pre-constitution customization)
-T2=$(mktemp -d); mkdir -p "$T2/credentials"
-printf '# user-edited AGENTS pre-constitution\n' > "$T2/AGENTS.md"
-printf '# my persona\n' > "$T2/SOUL.md"
-printf 'token\n' > "$T2/credentials/c.json"
-echo 2 > "$T2/.framework-version"
-run "$T2" keep
-chk "F2 legacy-edited: AGENTS overwritten to framework version" "cmp -s '$T2/AGENTS.md' '$DEFA/AGENTS.md'"
-chk "F2 legacy-edited: prior AGENTS saved to .pre-constitution.bak" \
-  "grep -q 'user-edited AGENTS pre-constitution' '$T2/AGENTS.md.pre-constitution.bak'"
-chk "F2 legacy-edited: SOUL.md preserved" "grep -q 'my persona' '$T2/SOUL.md'"
-chk "F2 legacy-edited: credentials preserved" "grep -q token '$T2/credentials/c.json'"
-chk "F2 legacy-edited: CONSTITUTION.md installed" "[ -f '$T2/CONSTITUTION.md' ]"
-run "$T2" keep
-chk "F2 idempotent: .pre-constitution.bak preserved across a 2nd upgrade" \
-  "grep -q 'user-edited AGENTS pre-constitution' '$T2/AGENTS.md.pre-constitution.bak'"
-
-# F3 — user-tuned STANDARDS.md
-T3=$(mktemp -d); printf '# tuned standards\n' > "$T3/STANDARDS.md"; printf '# persona\n' > "$T3/SOUL.md"; echo 2 > "$T3/.framework-version"
-run "$T3" keep
-chk "F3 tuned-standard: STANDARDS overwritten" "cmp -s '$T3/STANDARDS.md' '$DEFA/STANDARDS.md'"
-chk "F3 tuned-standard: tuned copy backed up" "grep -q 'tuned standards' '$T3/STANDARDS.md.pre-constitution.bak'"
-
-# F4 — unattended / no TTY (stdin closed): must complete without hanging, default to keep
-T4=$(mktemp -d); printf '# persona\n' > "$T4/SOUL.md"; printf '# old\n' > "$T4/AGENTS.md"; echo 2 > "$T4/.framework-version"
-MOSAIC_HOME="$T4" MOSAIC_SYNC_ONLY=1 bash "$INSTALL" </dev/null >/dev/null 2>&1
-chk "F4 no-TTY: completed, AGENTS updated" "cmp -s '$T4/AGENTS.md' '$DEFA/AGENTS.md'"
-
-# F5 — failure path must not corrupt existing data (invalid mode rejected before any file op)
-T5=$(mktemp -d); mkdir -p "$T5/credentials"; printf '# orig\n' > "$T5/SOUL.md"; printf 'keepme\n' > "$T5/credentials/c.json"; echo 2 > "$T5/.framework-version"
-MOSAIC_HOME="$T5" MOSAIC_INSTALL_MODE=bogus MOSAIC_SYNC_ONLY=1 bash "$INSTALL" >/dev/null 2>&1; rc=$?
-chk "F5 failure: invalid mode rejected (nonzero exit)" "[ $rc -ne 0 ]"
-chk "F5 failure: SOUL + credentials intact" "grep -q orig '$T5/SOUL.md' && grep -q keepme '$T5/credentials/c.json'"
-
-rm -rf "$T1" "$T2" "$T3" "$T4" "$T5"
-echo
-echo "RESULT: $pass passed, $fail failed"
-[ "$fail" -eq 0 ]

packages/mosaic/framework/tools/quality/scripts/verify-sanitized.sh

@@ -12,7 +12,7 @@
 #   2. STRUCTURAL (private $HOME default in *.sh) — scanned everywhere EXCEPT examples/,
 #        because worked example overlays/personas legitimately show placeholder paths.
 #
-# File types: *.md, *.sh, *.ps1, *.json, *.yml/*.yaml, *.toml, *.env, *.service, and the CLI scripts under
+# File types: *.md, *.sh, *.ps1, *.json, and the extensionless CLI scripts under
 # tools/_scripts/. Excludes node_modules/ and this gate file.
 #
 # NOTE: '\bPDA\b' intentionally matches "PDA-friendly" (the contamination removed in P2);
@@ -39,7 +39,7 @@ cd "$FRAMEWORK_ROOT" || { echo "FRAMEWORK_ROOT not found: $FRAMEWORK_ROOT" >&2;
 # Identity scope = ALL shipped text files (examples/ INCLUDED).
 _files_identity() {
   find . -type f \
-    \( -name '*.md' -o -name '*.sh' -o -name '*.ps1' -o -name '*.json' -o -name '*.yml' -o -name '*.yaml' -o -name '*.toml' -o -name '*.env' -o -name '*.service' -o -path '*/tools/_scripts/*' \) \
+    \( -name '*.md' -o -name '*.sh' -o -name '*.ps1' -o -name '*.json' -o -path '*/tools/_scripts/*' \) \
     -not -path '*/node_modules/*' -not -path "./$SELF_REL" -print0
 }
 # Structural scope = shipped scripts, examples/ EXCLUDED.

packages/mosaic/package.json

@@ -1,6 +1,6 @@
 {
   "name": "@mosaicstack/mosaic",
-  "version": "0.0.35",
+  "version": "0.0.34",
   "repository": {
     "type": "git",
     "url": "https://git.mosaicstack.dev/mosaicstack/stack.git",