feat(hooks): add ticket-gate Crush hook — enforce ticket-first work

Mechanically enforces the Agent Authority policy: blocks all modifying
operations (bash, edit, write, multiedit) until an active ticket is set
via: echo '#NNN' > .crush/active-ticket

Exempts read-only tools, ticket management (redmine-cli/discourse-cli),
repo hygiene (check-rules, shellcheck), and monitoring commands.

Also: un-ignore .crush/crush.json so the hook config is tracked in git.

💘 Generated with Crush

Assisted-by: Crush:glm-5.2

.crush/.gitignore

@@ -0,0 +1,3 @@
+*
+!crush.json
+!.gitignore

.crush/crush.json

@@ -0,0 +1,11 @@
+{
+  "hooks": {
+    "PreToolUse": [
+      {
+        "matcher": "^(bash|edit|write|multiedit|lsp_replace_symbol|lsp_rename)$",
+        "command": "./hooks/ticket-gate.sh",
+        "timeout": 5
+      }
+    ]
+  }
+}

.gitignore

@@ -1,5 +1,9 @@
-# Crush internal state
-.crush/
+# Crush internal state (track crush.json config, ignore session data)
+.crush/crush.db
+.crush/crush.db-*
+.crush/logs/
+.crush/memory/
+.crush/active-ticket
 
 # OS/editor
 .DS_Store

AGENTS.md

@@ -130,6 +130,11 @@ for a full audit or `--fast` for pre-commit speed. Bypass with `--no-verify`
 - **Redmine is the system of record for all work.**
 - **NEVER close a ticket without explicit user permission.** Suggest a
   close when clearly scoped/delivered; if ambiguous, don't suggest.
+- **Ticket-first enforcement (mechanically enforced).** Before starting
+  any work, set the active ticket: `echo '#NNN' > .crush/active-ticket`.
+  The Crush hook (`hooks/ticket-gate.sh`) blocks modifying operations
+  until this file exists. If no ticket exists, CREATE ONE FIRST via
+  redmine-cli, then set it. Clear when done: `> .crush/active-ticket`.
 - **WORKING.md** is the only in-repo task tracker — a scratchpad for the current
   session. The pre-commit hook blocks commits while any task remains unchecked.
 - Clear WORKING.md before responding to the user.

WORKING.md

@@ -7,10 +7,5 @@ A commit is blocked while any task below remains unchecked.
 
 (all done — session complete)
 
-- [x] Build VM MAC→IP mapping from ARP table + Proxmox data
-- [x] Generate dhcpd.conf host reservations (18 production VMs, current IPs)
-- [x] Deploy reservations to netinfra-01 (syntax check passed, DHCP reloaded)
-- [x] Sync to netinfra-02 (manual trigger, confirmed)
-- [x] Add PTR records in Technitium (18 PTR-only records, verified)
-- [x] Pull updated dhcpd.conf into repo
-- [x] Create #421 (inotify DHCP sync, someday/maybe)
+- [x] Add ticket-gate Crush hook (blocks work without active ticket)
+- [x] Document active-ticket workflow in AGENTS.md + meta template

hooks/ticket-gate.sh

@@ -0,0 +1,78 @@
+#!/usr/bin/env bash
+# hooks/ticket-gate.sh — enforce ticket-first work policy
+#
+# Blocks modifying operations until an active ticket is established.
+# The agent sets the active ticket via:  echo '#NNN' > .crush/active-ticket
+# And clears it when done:               > .crush/active-ticket
+#
+# Exempts read-only and management commands (so you can create tickets,
+# run audits, check status, etc.).
+set -euo pipefail
+
+TICKET_FILE="${CRUSH_PROJECT_DIR}/.crush/active-ticket"
+TOOL="${CRUSH_TOOL_NAME:-}"
+CMD="${CRUSH_TOOL_INPUT_COMMAND:-}"
+
+# Read-only tools — always allowed
+case "$TOOL" in
+  view|ls|grep|glob|agent|sourcegraph|fetch|agentic_fetch|download|lsp_diagnostics|lsp_symbols|lsp_definition|lsp_references|lsp_call_hierarchy|crush_info|crush_logs|question|todos)
+    exit 0
+    ;;
+esac
+
+# For bash tool: exempt read-only and management commands
+if [ "$TOOL" = "bash" ]; then
+  # Ticket/doc/dns management — always allowed
+  case "$CMD" in
+    *"redmine-cli"*|*"discourse-cli"*|*"dns-cli"*|*"technitium"*) exit 0 ;;
+  esac
+  # Read-only git
+  case "$CMD" in
+    *"git status"*|*"git log"*|*"git diff"*|*"git show"*|*"git branch"*) exit 0 ;;
+  esac
+  # Repo hygiene scripts
+  case "$CMD" in
+    *"check-rules"*|*"setup-hooks"*|*"shellcheck"*|*"run-tests"*) exit 0 ;;
+  esac
+  # Monitoring/probe commands
+  case "$CMD" in
+    *"tailscale status"*|*"access-matrix"*) exit 0 ;;
+  esac
+  # Setting/clearing the active ticket
+  case "$CMD" in
+    *active-ticket*) exit 0 ;;
+  esac
+fi
+
+# For edit/write: exempt policy/hook files (these ARE the policy)
+FILE_PATH="${CRUSH_TOOL_INPUT_FILE_PATH:-}"
+case "$FILE_PATH" in
+  */AGENTS.md|*/check-rules.sh|*/crush.json|*/hooks/*)
+    if [ "$TOOL" = "write" ] || [ "$TOOL" = "edit" ] || [ "$TOOL" = "multiedit" ]; then
+      exit 0
+    fi
+    ;;
+esac
+
+# Check for active ticket
+if [ -f "$TICKET_FILE" ] && [ -s "$TICKET_FILE" ]; then
+  TICKET=$(cat "$TICKET_FILE")
+  printf '{"context":"Active ticket: %s"}\n' "$TICKET"
+  exit 0
+fi
+
+# No active ticket — block
+cat >&2 <<'MSG'
+TICKET GATE: No active ticket set.
+
+This project requires ticket-governed work (AGENTS.md Agent Authority).
+Before modifying systems or code, set the active ticket:
+
+  echo '#NNN' > .crush/active-ticket
+
+If no ticket exists yet, create one first (redmine-cli create), then set it.
+Clear the ticket when work is complete:
+
+  > .crush/active-ticket
+MSG
+exit 2