diff --git a/.github/workflows/opencode2-real-adapter.yml b/.github/workflows/opencode2-real-adapter.yml
index f02270e..7ebb022 100644
--- a/.github/workflows/opencode2-real-adapter.yml
+++ b/.github/workflows/opencode2-real-adapter.yml
@@ -62,10 +62,10 @@ jobs:
           if [ ! -f "$OPENCODE_LOOP_V2_MARKER" ]; then
             opencode2 api get /api/plugin -H "x-opencode-directory: $OPENCODE_LOOP_V2_PROJECT" > "$RUNNER_TEMP/opencode2-real-plugin.json" 2>&1 || true
           fi
-          for attempt in $(seq 1 50); do
+          for attempt in $(seq 1 80); do
             if [ -f "$OPENCODE_LOOP_V2_MARKER" ]; then
               cat "$OPENCODE_LOOP_V2_MARKER"
-              node -e 'const fs=require("node:fs"); const value=JSON.parse(fs.readFileSync(process.argv[1],"utf8")); if(value.id!=="bybrawe.opencode-loop.v2.experimental" || value.activated!==true || value.commandTransform!==true || value.eventSubscribe!==true || value.sessionPrompt!==true || value.sessionCommand!==true) process.exit(1)' "$OPENCODE_LOOP_V2_MARKER"
+              node -e 'const fs=require("node:fs"); const value=JSON.parse(fs.readFileSync(process.argv[1],"utf8")); if(value.id!=="bybrawe.opencode-loop.v2.experimental" || value.activated!==true || value.commandTransform!==true || value.eventSubscribe!==true || value.sessionPrompt!==true || value.sessionCommand!==true || value.commandFieldProbe?.matched!==true) process.exit(1)' "$OPENCODE_LOOP_V2_MARKER"
               exit 0
             fi
             sleep 0.2
diff --git a/scripts/fixtures/opencode2-real-adapter-probe.js b/scripts/fixtures/opencode2-real-adapter-probe.js
index d20dbe4..b30885e 100644
--- a/scripts/fixtures/opencode2-real-adapter-probe.js
+++ b/scripts/fixtures/opencode2-real-adapter-probe.js
@@ -1,5 +1,7 @@
 import { writeFile } from "node:fs/promises"
 
+const COMMAND_SENTINEL = "__opencode_loop_missing_command_probe__"
+
 export default {
   id: "bybrawe.opencode-loop.v2.real-adapter-probe",
   async setup(ctx) {
@@ -19,6 +21,35 @@ export default {
         .map((key) => [key, typeof ctx.session[key]]),
     )
 
+    let commandFieldProbe = { matched: false, error: "session command probe did not run" }
+    if (typeof ctx?.session?.create === "function" && typeof ctx?.session?.command === "function") {
+      try {
+        const created = await ctx.session.create()
+        const sessionID = String(created?.id || created?.data?.id || created?.sessionID || "")
+        if (!sessionID) throw new Error("session.create returned no session id")
+        try {
+          await ctx.session.command({ sessionID, command: COMMAND_SENTINEL })
+          commandFieldProbe = {
+            matched: false,
+            sessionID,
+            error: "missing command unexpectedly succeeded",
+          }
+        } catch (error) {
+          const message = error instanceof Error ? error.message : String(error)
+          commandFieldProbe = {
+            matched: message.includes(`Command not found: ${COMMAND_SENTINEL}`),
+            sessionID,
+            error: message,
+          }
+        }
+      } catch (error) {
+        commandFieldProbe = {
+          matched: false,
+          error: error instanceof Error ? error.message : String(error),
+        }
+      }
+    }
+
     await writeFile(marker, JSON.stringify({
       id: plugin.id,
       activated: true,
@@ -28,6 +59,7 @@ export default {
       sessionCommand: typeof ctx?.session?.command === "function",
       sessionShell: typeof ctx?.session?.shell === "function",
       sessionMethods,
+      commandFieldProbe,
       toolTransform: typeof ctx?.tool?.transform === "function",
     }, null, 2), "utf8")
 
diff --git a/scripts/v2-command-adapter-test.mjs b/scripts/v2-command-adapter-test.mjs
index acbdbb8..6761df9 100644
--- a/scripts/v2-command-adapter-test.mjs
+++ b/scripts/v2-command-adapter-test.mjs
@@ -54,12 +54,10 @@ async function waitFor(predicate, description, timeoutMs = 2_000) {
   }
   const adapter = createOpenCode2RuntimeAdapter(ctx)
   await adapter.start()
-  const result = await adapter.command({ sessionID: "ses_adapter", id: "/review", arguments: "--quick" })
+  const result = await adapter.command({ sessionID: "ses_adapter", command: "/review", arguments: "--quick" })
   assert.deepEqual(result, { accepted: true })
-  assert.equal(commands.length, 1)
-  assert.equal(commands[0].sessionID, "ses_adapter")
-  assert.equal(commands[0].id, "review")
-  assert.equal(commands[0].arguments, "--quick")
+  assert.deepEqual(commands, [{ sessionID: "ses_adapter", command: "review", arguments: "--quick" }])
+  assert.equal(Object.prototype.hasOwnProperty.call(commands[0], "id"), false)
   await adapter.dispose()
 }
 
@@ -70,7 +68,7 @@ async function waitFor(predicate, description, timeoutMs = 2_000) {
     session: { prompt: async () => ({ accepted: true }) },
   })
   await adapter.start()
-  await assert.rejects(adapter.command({ sessionID: "ses_adapter", id: "review" }), /session\.command capability is unavailable/)
+  await assert.rejects(adapter.command({ sessionID: "ses_adapter", command: "review" }), /session\.command capability is unavailable/)
   await adapter.dispose()
 }
 
@@ -105,7 +103,7 @@ async function waitFor(predicate, description, timeoutMs = 2_000) {
     })
     events.push({ directory, payload: { type: "session.idle", properties: { sessionID } } })
     await waitFor(() => commands.length === 1, "V2 command dispatch")
-    assert.deepEqual(commands[0], { sessionID, id: "review", arguments: "--quick" })
+    assert.deepEqual(commands[0], { sessionID, command: "review", arguments: "--quick" })
   } finally {
     await cleanup?.()
     await rm(directory, { recursive: true, force: true })
diff --git a/scripts/v2-command-runtime-test.mjs b/scripts/v2-command-runtime-test.mjs
index 0bf665c..9bd7be9 100644
--- a/scripts/v2-command-runtime-test.mjs
+++ b/scripts/v2-command-runtime-test.mjs
@@ -34,8 +34,9 @@ try {
   const first = await runtime.onEvent({ kind: "session", action: "idle", sessionID, directory })
   assert.equal(first.dispatched, true)
   assert.equal(first.kind, "command")
-  assert.deepEqual(first.request, { sessionID, id: "review", arguments: "--quick" })
-  assert.deepEqual(commands, [{ sessionID, id: "review", arguments: "--quick" }])
+  assert.deepEqual(first.request, { sessionID, command: "review", arguments: "--quick" })
+  assert.deepEqual(commands, [{ sessionID, command: "review", arguments: "--quick" }])
+  assert.equal(Object.prototype.hasOwnProperty.call(commands[0], "id"), false, "OpenCode 2 id is a msg_ message ID, never the command name")
   assert.equal(prompts.length, 0)
   let state = await readState()
   assert.equal(state.jobs[0].runCount, 1)
@@ -43,7 +44,7 @@ try {
 
   const second = await runtime.onEvent({ kind: "session", action: "idle", sessionID, directory })
   assert.equal(second.dispatched, true)
-  assert.deepEqual(commands[1], { sessionID, id: "review", arguments: "--quick" })
+  assert.deepEqual(commands[1], { sessionID, command: "review", arguments: "--quick" })
   state = await readState()
   assert.equal(state.jobs[0].runCount, 2)
   assert.equal(state.jobs[0].enabled, false)
@@ -52,6 +53,17 @@ try {
   assert.equal(third.dispatched, false)
   assert.equal(commands.length, 2)
 
+  const compact = await runtime.onEvent({
+    kind: "command",
+    action: "executed",
+    name: "loop",
+    sessionID,
+    directory,
+    arguments: '0s --command "/compact"',
+  })
+  assert.equal(compact.accepted, false)
+  assert.ok(compact.blockers.includes("kind"), "shared actionKind keeps /compact on the dedicated compact path")
+
   const shell = await runtime.onEvent({
     kind: "command",
     action: "executed",
diff --git a/scripts/v2-host-contract-test.mjs b/scripts/v2-host-contract-test.mjs
index aa1cabd..e53917d 100644
--- a/scripts/v2-host-contract-test.mjs
+++ b/scripts/v2-host-contract-test.mjs
@@ -24,7 +24,7 @@ const host = createOpenCode2HostContract({
 })
 
 await assert.rejects(host.prompt({ sessionID: "ses_a", text: "early" }), /not started/)
-await assert.rejects(host.command({ sessionID: "ses_a", id: "review" }), /not started/)
+await assert.rejects(host.command({ sessionID: "ses_a", command: "review" }), /not started/)
 assert.equal(await host.start(), true)
 assert.equal(await host.start(), false)
 assert.equal(typeof listener, "function")
@@ -43,25 +43,27 @@ assert.equal(prompts[0].sessionID, "ses_a")
 assert.equal(prompts[0].text, "continue")
 assert.equal(prompts[0].runtime, runtime)
 
-const commandResult = await host.command({ sessionID: "ses_a", id: "/review", arguments: "--quick" })
+const commandResult = await host.command({ sessionID: "ses_a", command: "/review", arguments: "--quick" })
 assert.deepEqual(commandResult, { accepted: true, kind: "command" })
 assert.equal(commands.length, 1)
 assert.equal(commands[0].sessionID, "ses_a")
-assert.equal(commands[0].id, "review")
+assert.equal(commands[0].command, "review")
+assert.equal(Object.prototype.hasOwnProperty.call(commands[0], "id"), false)
 assert.equal(commands[0].arguments, "--quick")
 assert.equal(commands[0].runtime, runtime)
 
 await assert.rejects(host.prompt({ sessionID: "", text: "missing" }), /session ID/)
 await assert.rejects(host.prompt({ sessionID: "ses_a", text: "   " }), /requires text/)
-await assert.rejects(host.command({ sessionID: "", id: "review" }), /session ID/)
-await assert.rejects(host.command({ sessionID: "ses_a", id: "" }), /requires an ID/)
+await assert.rejects(host.command({ sessionID: "", command: "review" }), /session ID/)
+await assert.rejects(host.command({ sessionID: "ses_a", command: "" }), /requires a command name/)
+await assert.rejects(host.command({ sessionID: "ses_a", id: "review" }), /requires a command name/)
 
 const promptOnly = createOpenCode2HostContract({
   subscribe: async (_callback) => ({ unsubscribe: async () => {} }),
   sendPrompt: async () => ({ accepted: true }),
 })
 await promptOnly.start()
-await assert.rejects(promptOnly.command({ sessionID: "ses_a", id: "review" }), /session\.command capability is unavailable/)
+await assert.rejects(promptOnly.command({ sessionID: "ses_a", command: "review" }), /session\.command capability is unavailable/)
 await promptOnly.dispose()
 
 await listener({
@@ -72,7 +74,7 @@ assert.equal(host.isHostDisposed(), true)
 assert.deepEqual(host.runtimeManager.entries(), [])
 assert.ok(events.some(({ event }) => event.kind === "server" && event.action === "disposed"))
 await assert.rejects(host.prompt({ sessionID: "ses_a", text: "late" }), /unavailable/)
-await assert.rejects(host.command({ sessionID: "ses_a", id: "review" }), /unavailable/)
+await assert.rejects(host.command({ sessionID: "ses_a", command: "review" }), /unavailable/)
 
 assert.equal(await host.dispose(), true)
 assert.equal(await host.dispose(), false)
diff --git a/src/source/opencode2/host-contract.js b/src/source/opencode2/host-contract.js
index 67d104c..fa76508 100644
--- a/src/source/opencode2/host-contract.js
+++ b/src/source/opencode2/host-contract.js
@@ -18,12 +18,12 @@ function normalizePrompt(input) {
 
 function normalizeCommand(input) {
   const sessionID = String(input?.sessionID || "").trim()
-  const id = String(input?.id || "").trim().replace(/^\/+/, "")
+  const command = String(input?.command || "").trim().replace(/^\/+/, "")
   if (!sessionID) throw new TypeError("command requires a session ID")
-  if (!id) throw new TypeError("command requires an ID")
+  if (!command) throw new TypeError("command requires a command name")
   return Object.freeze({
     sessionID,
-    id,
+    command,
     arguments: input?.arguments === undefined ? undefined : String(input.arguments),
     agent: input?.agent,
     model: input?.model,
diff --git a/src/source/opencode2/prompt-runtime.js b/src/source/opencode2/prompt-runtime.js
index 5cb3fa6..0962eb0 100644
--- a/src/source/opencode2/prompt-runtime.js
+++ b/src/source/opencode2/prompt-runtime.js
@@ -158,10 +158,10 @@ export function createOpenCode2PromptRuntime(options = {}) {
   async function dispatchJob(scope, job) {
     const kind = actionKind(job?.action, job)
     if (kind === "command") {
-      const [id, argumentsText] = commandParts(job.action)
+      const [command, argumentsText] = commandParts(job.action)
       const request = {
         sessionID: scope.sessionID,
-        id,
+        command,
         arguments: argumentsText || undefined,
       }
       await options.command(request)
diff --git a/src/source/opencode2/runtime-adapter.js b/src/source/opencode2/runtime-adapter.js
index 3876208..c34df3b 100644
--- a/src/source/opencode2/runtime-adapter.js
+++ b/src/source/opencode2/runtime-adapter.js
@@ -11,7 +11,7 @@ function promptRequest(request) {
 function commandRequest(request) {
   const value = {
     sessionID: request.sessionID,
-    id: request.id,
+    command: request.command,
   }
   if (request.arguments !== undefined) value.arguments = request.arguments
   if (request.agent !== undefined) value.agent = request.agent