Add command model, priority tie-break, and boundary matching

Why: I1 increment one - recognition output becomes a command list
for the host router, same-score ties resolve by priority (I5), and
CJK substring false positives get an opt-in boundary mode (I3).

Evidence: go vet clean; go test ./... all ok, including new command
(6), boundary (3), and tie-break tests; intentctl lint smoke run
shows boundary hints on short unbounded terms. Existing classifier
and ambiguity fixtures repointed to an equal-priority pair; the
greet corpus case now expects the I5 tie-break outcome.

Impact: Result gains Commands; recognizer derives them at one point
(guard/fallback stay empty); MatchSpec gains Boundary (default off,
legacy behavior unchanged); lint gains boundary hints. Top/Branch
stay for compatibility.

Refs: Documents proposal 2026-10-07-agent-stack-n1q1i1-plans.md I1 WP1/WP4/WP5

intent/testdata/corpus.json

@@ -1,14 +1,72 @@
 {
   "cases": [
-    {"name": "status_with_slot", "input": "查询任务 42 的进度", "expect_branch": "matched", "expect_top": "demo.run.status_query", "expect_slots": {"run_id": "42"}},
-    {"name": "status_term_only", "input": "帮我看下进度", "expect_branch": "matched", "expect_top": "demo.run.status_query"},
-    {"name": "guard_config_query", "input": "查询系统配置", "expect_branch": "guard_hit", "expect_top": "guard.config_change"},
-    {"name": "negated_write_readonly", "input": "怎么配置查询进度", "expect_branch": "fallback"},
-    {"name": "restart_task", "input": "把任务重启一下", "expect_branch": "matched", "expect_top": "demo.run.restart"},
-    {"name": "greet_ambiguous", "input": "你好呀", "expect_branch": "ambiguous"},
-    {"name": "cancel_missing_required_slot", "input": "取消一下", "expect_branch": "matched", "expect_top": "demo.run.cancel", "expect_missing_slots": ["run_id"]},
-    {"name": "case_fold_deploy", "input": "please DEPLOY it", "expect_branch": "matched", "expect_top": "demo.misc.deploy"},
-    {"name": "casual_fallback", "input": "今天天气不错", "expect_branch": "fallback"},
-    {"name": "blank_fallback", "input": "   ", "expect_branch": "fallback"}
+    {
+      "name": "status_with_slot",
+      "input": "查询任务 42 的进度",
+      "expect_branch": "matched",
+      "expect_top": "demo.run.status_query",
+      "expect_slots": {
+        "run_id": "42"
+      }
+    },
+    {
+      "name": "status_term_only",
+      "input": "帮我看下进度",
+      "expect_branch": "matched",
+      "expect_top": "demo.run.status_query"
+    },
+    {
+      "name": "guard_config_query",
+      "input": "查询系统配置",
+      "expect_branch": "guard_hit",
+      "expect_top": "guard.config_change"
+    },
+    {
+      "name": "negated_write_readonly",
+      "input": "怎么配置查询进度",
+      "expect_branch": "fallback"
+    },
+    {
+      "name": "restart_task",
+      "input": "把任务重启一下",
+      "expect_branch": "matched",
+      "expect_top": "demo.run.restart"
+    },
+    {
+      "name": "greet_tiebreak_priority",
+      "input": "你好呀",
+      "expect_branch": "matched",
+      "expect_top": "demo.greet.hello"
+    },
+    {
+      "name": "cancel_missing_required_slot",
+      "input": "取消一下",
+      "expect_branch": "matched",
+      "expect_top": "demo.run.cancel",
+      "expect_missing_slots": [
+        "run_id"
+      ]
+    },
+    {
+      "name": "case_fold_deploy",
+      "input": "please DEPLOY it",
+      "expect_branch": "matched",
+      "expect_top": "demo.misc.deploy"
+    },
+    {
+      "name": "casual_fallback",
+      "input": "今天天气不错",
+      "expect_branch": "fallback"
+    },
+    {
+      "name": "blank_fallback",
+      "input": "   ",
+      "expect_branch": "fallback"
+    },
+    {
+      "name": "tie_ambiguous",
+      "input": "打结",
+      "expect_branch": "ambiguous"
+    }
   ]
-}
+}

intent/testdata/specs/base.json

@@ -6,24 +6,49 @@
       "version": 1,
       "description": "查询任务运行进度",
       "matcher": {
-        "includes_any": ["进度", "状态"],
-        "excludes_any": ["配置"]
+        "includes_any": [
+          "进度",
+          "状态"
+        ],
+        "excludes_any": [
+          "配置"
+        ]
       },
       "slots": [
-        {"key": "run_id", "required": false, "pattern": "(?:run|任务)[:# ]*([A-Za-z0-9-]+)", "group": 1}
+        {
+          "key": "run_id",
+          "required": false,
+          "pattern": "(?:run|任务)[:# ]*([A-Za-z0-9-]+)",
+          "group": 1
+        }
       ],
-      "confidence": {"base": 0.8, "threshold": 0.7},
+      "confidence": {
+        "base": 0.8,
+        "threshold": 0.7
+      },
       "risk": "low",
       "handler": "taskrun.query_status",
-      "metadata": {"channel": "dialogue"}
+      "metadata": {
+        "channel": "dialogue"
+      }
     },
     {
       "id": "demo.run.restart",
       "domain": "demo",
       "version": 1,
       "description": "重启任务",
-      "matcher": {"includes_any": ["重启"], "includes_all": ["任务"]},
-      "confidence": {"base": 0.75, "threshold": 0.7},
+      "matcher": {
+        "includes_any": [
+          "重启"
+        ],
+        "includes_all": [
+          "任务"
+        ]
+      },
+      "confidence": {
+        "base": 0.75,
+        "threshold": 0.7
+      },
       "risk": "medium",
       "requires_confirm": true,
       "handler": "taskrun.restart"
@@ -33,9 +58,18 @@
       "domain": "demo",
       "version": 1,
       "description": "取消任务",
-      "matcher": {"includes_any": ["取消"]},
+      "matcher": {
+        "includes_any": [
+          "取消"
+        ]
+      },
       "slots": [
-        {"key": "run_id", "required": true, "pattern": "(?:run|任务)[:# ]*([A-Za-z0-9-]+)", "group": 1}
+        {
+          "key": "run_id",
+          "required": true,
+          "pattern": "(?:run|任务)[:# ]*([A-Za-z0-9-]+)",
+          "group": 1
+        }
       ],
       "handler": "taskrun.cancel"
     },
@@ -43,23 +77,59 @@
       "id": "demo.greet.hello",
       "domain": "demo",
       "version": 1,
-      "matcher": {"includes_any": ["你好"]},
+      "matcher": {
+        "includes_any": [
+          "你好"
+        ]
+      },
       "priority": 10
     },
     {
       "id": "demo.greet.hi",
       "domain": "demo",
       "version": 1,
-      "matcher": {"includes_any": ["你好"]},
+      "matcher": {
+        "includes_any": [
+          "你好"
+        ]
+      },
       "priority": 5
     },
     {
       "id": "demo.misc.deploy",
       "domain": "demo",
       "version": 1,
-      "matcher": {"includes_any": ["deploy", "发布"], "case_sensitive": false},
+      "matcher": {
+        "includes_any": [
+          "deploy",
+          "发布"
+        ],
+        "case_sensitive": false
+      },
       "handler": "deploy.run"
+    },
+    {
+      "id": "demo.tie.alpha",
+      "domain": "demo",
+      "version": 1,
+      "matcher": {
+        "includes_any": [
+          "打结"
+        ]
+      },
+      "priority": 5
+    },
+    {
+      "id": "demo.tie.beta",
+      "domain": "demo",
+      "version": 1,
+      "matcher": {
+        "includes_any": [
+          "打结"
+        ]
+      },
+      "priority": 5
     }
   ],
   "disable": []
-}
+}