diff --git a/CHANGELOG.md b/CHANGELOG.md
index 487b9feb..4f85c3f8 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -21,6 +21,7 @@
 - Transcripts: `--timestamps` adds segment-level timings (`transcriptSegments` + `transcriptTimedText`) for YouTube, podcasts, and embedded captions.
 - Media-aware summarization in the Side Panel: Page vs Video/Audio dropdown, automatic media preference on video sites, plus visible word count/duration.
 - CLI: transcribe local audio/video files with mtime-aware transcript cache invalidation (thanks @mvance!).
+- CLI: add Cursor Agent CLI provider (`cli/agent`, `--cli agent`).
 - Browser extension: add Firefox sidebar build + multi-browser config (#31, thanks @vlnd0).
 - Chrome automation: add artifacts tool + REPL helpers for persistent session files (notes/JSON/CSV) and downloads.
 - Chrome automation: expand navigate tool with list/switch tab support and return matching skills after navigation.
diff --git a/README.md b/README.md
index 1631c028..7ab73e3a 100644
--- a/README.md
+++ b/README.md
@@ -243,7 +243,7 @@ Use `summarize --help` or `summarize help` for the full help text.
 - `--length short|medium|long|xl|xxl|s|m|l|<chars>`
 - `--language, --lang <language>`: output language (`auto` = match source)
 - `--max-output-tokens <count>`: hard cap for LLM output tokens
-- `--cli [provider]`: use a CLI provider (`--model cli/<provider>`). If omitted, uses auto selection with CLI enabled.
+- `--cli [provider]`: use a CLI provider (`--model cli/<provider>`). Supports `claude`, `gemini`, `codex`, `agent`. If omitted, uses auto selection with CLI enabled.
 - `--stream auto|on|off`: stream LLM output (`auto` = TTY only; disabled in `--json` mode)
 - `--plain`: keep raw output (no ANSI/OSC Markdown rendering)
 - `--no-color`: disable ANSI colors
@@ -272,7 +272,7 @@ Why: CLI adds ~4s latency per attempt and higher variance.
 Shortcut: `--cli` (with no provider) uses auto selection with CLI enabled.
 
 When enabled, auto prepends CLI attempts in the order listed in `cli.enabled`
-(recommended: `["gemini"]`), then tries the native provider candidates
+(recommended: `["gemini"]` or `["agent"]`), then tries the native provider candidates
 (with OpenRouter fallbacks when configured).
 
 Enable CLI attempts:
diff --git a/docs/cli.md b/docs/cli.md
index 44753a8d..1307b726 100644
--- a/docs/cli.md
+++ b/docs/cli.md
@@ -6,13 +6,14 @@ read_when:
 
 # CLI models
 
-Summarize can use installed CLIs (Claude, Codex, Gemini) as local model backends.
+Summarize can use installed CLIs (Claude, Codex, Gemini, Cursor Agent) as local model backends.
 
 ## Model ids
 
 - `cli/claude/<model>` (e.g. `cli/claude/sonnet`)
 - `cli/codex/<model>` (e.g. `cli/codex/gpt-5.2`)
 - `cli/gemini/<model>` (e.g. `cli/gemini/gemini-3-flash-preview`)
+- `cli/agent/<model>` (e.g. `cli/agent/gpt-5.2`)
 
 Use `--cli [provider]` (case-insensitive) for the provider default, or `--model cli/<provider>/<model>` to pin a model.
 If `--cli` is provided without a provider, auto selection is used with CLI enabled.
@@ -22,12 +23,12 @@ If `--cli` is provided without a provider, auto selection is used with CLI enabl
 Auto mode does **not** use CLIs unless you set `cli.enabled` in config.
 
 Why: CLI adds ~4s latency per attempt and higher variance.
-Recommendation: enable only Gemini unless you have a reason to add others.
+Recommendation: enable only Gemini or Agent unless you have a reason to add others.
 
 Gemini CLI performance: summarize sets `GEMINI_CLI_NO_RELAUNCH=true` for Gemini CLI runs to avoid a costly self-relaunch (can be overridden by setting it yourself).
 
 When enabled, auto prepends CLI attempts in the order listed in `cli.enabled`
-(recommended: `["gemini"]`).
+(recommended: `["gemini"]` or `["agent"]`).
 
 Enable CLI attempts:
 
@@ -52,6 +53,7 @@ Note: when `cli.enabled` is set, it also acts as an allowlist for explicit `--cl
 Binary lookup:
 
 - `CLAUDE_PATH`, `CODEX_PATH`, `GEMINI_PATH` (optional overrides)
+- `AGENT_PATH` (optional override)
 - Otherwise uses `PATH`
 
 ## Attachments (images/files)
@@ -62,19 +64,24 @@ path-based prompt and enables the required tool flags:
 - Claude: `--tools Read --dangerously-skip-permissions`
 - Gemini: `--yolo` and `--include-directories <dir>`
 - Codex: `codex exec --output-last-message ...` and `-i <image>` for images
+- Agent: uses built-in file tools in `agent --print` mode (no extra flags)
 
 ## Config
 
 ```json
 {
   "cli": {
-    "enabled": ["claude", "gemini", "codex"],
+    "enabled": ["claude", "gemini", "codex", "agent"],
     "codex": { "model": "gpt-5.2" },
     "gemini": { "model": "gemini-3-flash-preview", "extraArgs": ["--verbose"] },
     "claude": {
       "model": "sonnet",
       "binary": "/usr/local/bin/claude",
       "extraArgs": ["--verbose"]
+    },
+    "agent": {
+      "model": "gpt-5.2",
+      "binary": "/usr/local/bin/agent"
     }
   }
 }
@@ -84,6 +91,7 @@ Notes:
 
 - CLI output is treated as text only (no token accounting).
 - If a CLI call fails, auto mode falls back to the next candidate.
+- Cursor Agent CLI uses the `agent` binary and relies on Cursor CLI auth (login or `CURSOR_API_KEY`).
 
 ## Generate free preset (OpenRouter)
 
diff --git a/docs/config.md b/docs/config.md
index 2c7a6f19..d91dfe10 100644
--- a/docs/config.md
+++ b/docs/config.md
@@ -272,9 +272,10 @@ Examples:
 ```json
 {
   "cli": {
-    "enabled": ["gemini"],
+    "enabled": ["gemini", "agent"],
     "codex": { "model": "gpt-5.2" },
-    "claude": { "binary": "/usr/local/bin/claude", "extraArgs": ["--verbose"] }
+    "claude": { "binary": "/usr/local/bin/claude", "extraArgs": ["--verbose"] },
+    "agent": { "binary": "/usr/local/bin/agent", "model": "gpt-5.2" }
   }
 }
 ```
@@ -282,7 +283,7 @@ Examples:
 Notes:
 
 - `cli.enabled` is an allowlist (auto uses CLIs only when set; explicit `--cli` / `--model cli/...` must be included).
-- Recommendation: keep `cli.enabled` to `["gemini"]` unless you have a reason to add others (extra latency/variance).
+- Recommendation: keep `cli.enabled` to `["gemini"]` or `["agent"]` unless you have a reason to add others (extra latency/variance).
 - `cli.<provider>.binary` overrides CLI binary discovery.
 - `cli.<provider>.extraArgs` appends extra CLI args.
 
diff --git a/docs/llm.md b/docs/llm.md
index 7dba2b7f..914225e6 100644
--- a/docs/llm.md
+++ b/docs/llm.md
@@ -30,7 +30,7 @@ installed, auto mode can use local CLI models when `cli.enabled` is set (see `do
 - `ANTHROPIC_API_KEY` (required for `anthropic/...` models)
 - `ANTHROPIC_BASE_URL` (optional; override Anthropic API endpoint)
 - `SUMMARIZE_MODEL` (optional; overrides default model selection)
-- `CLAUDE_PATH` / `CODEX_PATH` / `GEMINI_PATH` (optional; override CLI binary paths)
+- `CLAUDE_PATH` / `CODEX_PATH` / `GEMINI_PATH` / `AGENT_PATH` (optional; override CLI binary paths)
 
 ## Flags
 
@@ -39,6 +39,7 @@ installed, auto mode can use local CLI models when `cli.enabled` is set (see `do
     - `cli/codex/gpt-5.2`
     - `cli/claude/sonnet`
     - `cli/gemini/gemini-3-flash-preview`
+    - `cli/agent/gpt-5.2`
     - `google/gemini-3-flash-preview`
     - `openai/gpt-5-mini`
     - `zai/glm-4.7`
@@ -47,7 +48,7 @@ installed, auto mode can use local CLI models when `cli.enabled` is set (see `do
     - `anthropic/claude-sonnet-4-5`
     - `openrouter/meta-llama/llama-3.3-70b-instruct:free` (force OpenRouter)
 - `--cli [provider]`
-  - Examples: `--cli claude`, `--cli Gemini`, `--cli codex` (equivalent to `--model cli/<provider>`); `--cli` alone uses auto selection with CLI enabled.
+  - Examples: `--cli claude`, `--cli Gemini`, `--cli codex`, `--cli agent` (equivalent to `--model cli/<provider>`); `--cli` alone uses auto selection with CLI enabled.
 - `--model auto`
   - See `docs/model-auto.md`
 - `--model <preset>`
diff --git a/src/config.ts b/src/config.ts
index d1e6beca..36e74a19 100644
--- a/src/config.ts
+++ b/src/config.ts
@@ -6,7 +6,7 @@ import { isCliThemeName, listCliThemes } from './tty/theme.js'
 
 export type AutoRuleKind = 'text' | 'website' | 'youtube' | 'image' | 'video' | 'file'
 export type VideoMode = 'auto' | 'transcript' | 'understand'
-export type CliProvider = 'claude' | 'codex' | 'gemini'
+export type CliProvider = 'claude' | 'codex' | 'gemini' | 'agent'
 export type CliProviderConfig = {
   binary?: string
   extraArgs?: string[]
@@ -17,6 +17,7 @@ export type CliConfig = {
   claude?: CliProviderConfig
   codex?: CliProviderConfig
   gemini?: CliProviderConfig
+  agent?: CliProviderConfig
 }
 
 export type OpenAiConfig = {
@@ -215,7 +216,7 @@ function parseAutoRuleKind(value: unknown): AutoRuleKind | null {
 
 function parseCliProvider(value: unknown, path: string): CliProvider {
   const trimmed = typeof value === 'string' ? value.trim().toLowerCase() : ''
-  if (trimmed === 'claude' || trimmed === 'codex' || trimmed === 'gemini') {
+  if (trimmed === 'claude' || trimmed === 'codex' || trimmed === 'gemini' || trimmed === 'agent') {
     return trimmed as CliProvider
   }
   throw new Error(`Invalid config file ${path}: unknown CLI provider "${String(value)}".`)
@@ -852,6 +853,7 @@ export function loadSummarizeConfig({ env }: { env: Record<string, string | unde
     const claude = value.claude ? parseCliProviderConfig(value.claude, path, 'claude') : undefined
     const codex = value.codex ? parseCliProviderConfig(value.codex, path, 'codex') : undefined
     const gemini = value.gemini ? parseCliProviderConfig(value.gemini, path, 'gemini') : undefined
+    const agent = value.agent ? parseCliProviderConfig(value.agent, path, 'agent') : undefined
     const promptOverride =
       typeof value.promptOverride === 'string' && value.promptOverride.trim().length > 0
         ? value.promptOverride.trim()
@@ -868,6 +870,7 @@ export function loadSummarizeConfig({ env }: { env: Record<string, string | unde
       claude ||
       codex ||
       gemini ||
+      agent ||
       promptOverride ||
       typeof allowTools === 'boolean' ||
       cwd ||
@@ -877,6 +880,7 @@ export function loadSummarizeConfig({ env }: { env: Record<string, string | unde
           ...(claude ? { claude } : {}),
           ...(codex ? { codex } : {}),
           ...(gemini ? { gemini } : {}),
+          ...(agent ? { agent } : {}),
           ...(promptOverride ? { promptOverride } : {}),
           ...(typeof allowTools === 'boolean' ? { allowTools } : {}),
           ...(cwd ? { cwd } : {}),
diff --git a/src/daemon/env-snapshot.ts b/src/daemon/env-snapshot.ts
index 85b45dac..73908fae 100644
--- a/src/daemon/env-snapshot.ts
+++ b/src/daemon/env-snapshot.ts
@@ -28,6 +28,7 @@ const ENV_KEYS = [
   'CLAUDE_PATH',
   'CODEX_PATH',
   'GEMINI_PATH',
+  'AGENT_PATH',
   'UVX_PATH',
 ] as const
 
diff --git a/src/llm/cli.ts b/src/llm/cli.ts
index 112bb185..a85f2ae9 100644
--- a/src/llm/cli.ts
+++ b/src/llm/cli.ts
@@ -11,6 +11,14 @@ const DEFAULT_BINARIES: Record<CliProvider, string> = {
   claude: 'claude',
   codex: 'codex',
   gemini: 'gemini',
+  agent: 'agent',
+}
+
+const PROVIDER_PATH_ENV: Record<CliProvider, string> = {
+  claude: 'CLAUDE_PATH',
+  codex: 'CODEX_PATH',
+  gemini: 'GEMINI_PATH',
+  agent: 'AGENT_PATH',
 }
 
 type RunCliModelOptions = {
@@ -50,8 +58,16 @@ export function resolveCliBinary(
   env: Record<string, string | undefined>
 ): string {
   const providerConfig =
-    provider === 'claude' ? config?.claude : provider === 'codex' ? config?.codex : config?.gemini
+    provider === 'claude'
+      ? config?.claude
+      : provider === 'codex'
+        ? config?.codex
+        : provider === 'gemini'
+          ? config?.gemini
+          : config?.agent
   if (isNonEmptyString(providerConfig?.binary)) return providerConfig.binary.trim()
+  const pathKey = PROVIDER_PATH_ENV[provider]
+  if (isNonEmptyString(env[pathKey])) return env[pathKey].trim()
   const envKey = `SUMMARIZE_CLI_${provider.toUpperCase()}`
   if (isNonEmptyString(env[envKey])) return env[envKey].trim()
   return DEFAULT_BINARIES[provider]
@@ -319,6 +335,45 @@ export async function runCliModel({
     throw new Error('CLI returned empty output')
   }
 
+  if (provider === 'agent') {
+    args.push('--print', '--output-format', 'json')
+    if (!allowTools) {
+      args.push('--mode', 'ask')
+    }
+    if (model && model.trim().length > 0) {
+      args.push('--model', model.trim())
+    }
+    args.push(prompt)
+    const { stdout } = await execCliWithInput({
+      execFileImpl: execFileFn,
+      cmd: binary,
+      args,
+      input: '',
+      timeoutMs,
+      env: effectiveEnv,
+      cwd,
+    })
+    const trimmed = stdout.trim()
+    if (!trimmed) {
+      throw new Error('CLI returned empty output')
+    }
+    const parsed = parseJsonFromOutput(trimmed)
+    if (parsed && typeof parsed === 'object') {
+      const payload = parsed as Record<string, unknown>
+      const resultText =
+        payload.result ??
+        payload.response ??
+        payload.output ??
+        payload.message ??
+        payload.text ??
+        null
+      if (typeof resultText === 'string' && resultText.trim().length > 0) {
+        return { text: resultText.trim(), usage: null, costUsd: null }
+      }
+    }
+    return { text: trimmed, usage: null, costUsd: null }
+  }
+
   if (model && model.trim().length > 0) {
     args.push('--model', model.trim())
   }
diff --git a/src/model-auto.ts b/src/model-auto.ts
index 186e53d6..9f145d68 100644
--- a/src/model-auto.ts
+++ b/src/model-auto.ts
@@ -36,6 +36,7 @@ export type AutoModelAttempt = {
     | 'CLI_CLAUDE'
     | 'CLI_CODEX'
     | 'CLI_GEMINI'
+    | 'CLI_AGENT'
   debug: string
 }
 
@@ -197,6 +198,7 @@ const DEFAULT_CLI_MODELS: Record<CliProvider, string> = {
   claude: 'sonnet',
   codex: 'gpt-5.2',
   gemini: 'gemini-3-flash-preview',
+  agent: 'gpt-5.2',
 }
 
 function isCliProviderEnabled(provider: CliProvider, config: SummarizeConfig | null): boolean {
@@ -223,7 +225,8 @@ function parseCliCandidate(
     .map((entry) => entry.trim())
   if (parts.length < 2) return null
   const provider = parts[1]?.toLowerCase()
-  if (provider !== 'claude' && provider !== 'codex' && provider !== 'gemini') return null
+  if (provider !== 'claude' && provider !== 'codex' && provider !== 'gemini' && provider !== 'agent')
+    return null
   const model = parts.slice(2).join('/').trim()
   return { provider, model: model.length > 0 ? model : null }
 }
@@ -243,7 +246,9 @@ function requiredEnvForCandidate(modelId: string): AutoModelAttempt['requiredEnv
       ? 'CLI_CODEX'
       : parsed.provider === 'gemini'
         ? 'CLI_GEMINI'
-        : 'CLI_CLAUDE'
+        : parsed.provider === 'agent'
+          ? 'CLI_AGENT'
+          : 'CLI_CLAUDE'
   }
   if (isCandidateOpenRouter(modelId)) return 'OPENROUTER_API_KEY'
   const parsed = parseGatewayStyleModelId(normalizeGatewayStyleModelId(modelId))
@@ -365,7 +370,9 @@ function prependCliCandidates({
         ? cli?.gemini?.model
         : provider === 'codex'
           ? cli?.codex?.model
-          : cli?.claude?.model
+          : provider === 'agent'
+            ? cli?.agent?.model
+            : cli?.claude?.model
     add(provider, modelOverride)
   }
   if (cliCandidates.length === 0) return candidates
diff --git a/src/model-spec.ts b/src/model-spec.ts
index 78ea6e19..4f01c92a 100644
--- a/src/model-spec.ts
+++ b/src/model-spec.ts
@@ -5,6 +5,7 @@ const DEFAULT_CLI_MODELS: Record<CliProvider, string> = {
   claude: 'sonnet',
   codex: 'gpt-5.2',
   gemini: 'gemini-3-flash-preview',
+  agent: 'gpt-5.2',
 }
 
 export type FixedModelSpec =
@@ -39,7 +40,7 @@ export type FixedModelSpec =
       llmModelId: null
       openrouterProviders: null
       forceOpenRouter: false
-      requiredEnv: 'CLI_CLAUDE' | 'CLI_CODEX' | 'CLI_GEMINI'
+      requiredEnv: 'CLI_CLAUDE' | 'CLI_CODEX' | 'CLI_GEMINI' | 'CLI_AGENT'
       cliProvider: CliProvider
       cliModel: string | null
     }
@@ -100,14 +101,25 @@ export function parseRequestedModelId(raw: string): RequestedModel {
       .map((part) => part.trim())
       .filter((part) => part.length > 0)
     const providerRaw = parts[1]?.toLowerCase() ?? ''
-    if (providerRaw !== 'claude' && providerRaw !== 'codex' && providerRaw !== 'gemini') {
+    if (
+      providerRaw !== 'claude' &&
+      providerRaw !== 'codex' &&
+      providerRaw !== 'gemini' &&
+      providerRaw !== 'agent'
+    ) {
       throw new Error(`Invalid CLI model id "${trimmed}". Expected cli/<provider>/<model>.`)
     }
     const cliProvider = providerRaw as CliProvider
     const requestedModel = parts.slice(2).join('/').trim()
     const cliModel = requestedModel.length > 0 ? requestedModel : DEFAULT_CLI_MODELS[cliProvider]
     const requiredEnv =
-      cliProvider === 'claude' ? 'CLI_CLAUDE' : cliProvider === 'codex' ? 'CLI_CODEX' : 'CLI_GEMINI'
+      cliProvider === 'claude'
+        ? 'CLI_CLAUDE'
+        : cliProvider === 'codex'
+          ? 'CLI_CODEX'
+          : cliProvider === 'gemini'
+            ? 'CLI_GEMINI'
+            : 'CLI_AGENT'
     const userModelId = `cli/${cliProvider}/${cliModel}`
     return {
       kind: 'fixed',
diff --git a/src/run/env.ts b/src/run/env.ts
index bad649e6..ceac960d 100644
--- a/src/run/env.ts
+++ b/src/run/env.ts
@@ -50,7 +50,7 @@ export function resolveCliAvailability({
   config: ConfigForCli
 }): Partial<Record<CliProvider, boolean>> {
   const cliConfig = config?.cli ?? null
-  const providers: CliProvider[] = ['claude', 'codex', 'gemini']
+  const providers: CliProvider[] = ['claude', 'codex', 'gemini', 'agent']
   const availability: Partial<Record<CliProvider, boolean>> = {}
   for (const provider of providers) {
     if (isCliDisabled(provider, cliConfig)) {
@@ -72,7 +72,7 @@ export function parseCliUserModelId(modelId: string): {
     .split('/')
     .map((part) => part.trim())
   const provider = parts[1]?.toLowerCase()
-  if (provider !== 'claude' && provider !== 'codex' && provider !== 'gemini') {
+  if (provider !== 'claude' && provider !== 'codex' && provider !== 'gemini' && provider !== 'agent') {
     throw new Error(`Invalid CLI model id "${modelId}". Expected cli/<provider>/<model>.`)
   }
   const model = parts.slice(2).join('/').trim()
@@ -81,7 +81,7 @@ export function parseCliUserModelId(modelId: string): {
 
 export function parseCliProviderArg(raw: string): CliProvider {
   const normalized = raw.trim().toLowerCase()
-  if (normalized === 'claude' || normalized === 'codex' || normalized === 'gemini') {
+  if (normalized === 'claude' || normalized === 'codex' || normalized === 'gemini' || normalized === 'agent') {
     return normalized as CliProvider
   }
   throw new Error(`Unsupported --cli: ${raw}`)
diff --git a/src/run/flows/url/types.ts b/src/run/flows/url/types.ts
index d777c3a9..b3a96a03 100644
--- a/src/run/flows/url/types.ts
+++ b/src/run/flows/url/types.ts
@@ -1,5 +1,5 @@
 import type { CacheState } from '../../../cache.js'
-import type { SummarizeConfig } from '../../../config.js'
+import type { CliProvider, SummarizeConfig } from '../../../config.js'
 import type {
   ExtractedLinkContent,
   LinkPreviewProgressEvent,
@@ -78,7 +78,7 @@ export type UrlFlowModel = {
   desiredOutputTokens: number | null
   configForModelSelection: SummarizeConfig | null
   envForAuto: Record<string, string | undefined>
-  cliAvailability: Partial<Record<'claude' | 'codex' | 'gemini', boolean>>
+  cliAvailability: Partial<Record<CliProvider, boolean>>
   openaiUseChatCompletions: boolean
   openaiWhisperUsdPerMinute: number
   apiStatus: {
diff --git a/src/run/help.ts b/src/run/help.ts
index cf6daca0..49f98353 100644
--- a/src/run/help.ts
+++ b/src/run/help.ts
@@ -126,7 +126,7 @@ export function buildProgram() {
     .addOption(
       new Option(
         '--cli [provider]',
-        'Use a CLI provider: claude, gemini, codex (equivalent to --model cli/<provider>). If omitted, use auto selection with CLI enabled.'
+        'Use a CLI provider: claude, gemini, codex, agent (equivalent to --model cli/<provider>). If omitted, use auto selection with CLI enabled.'
       )
     )
     .option('--extract', 'Print extracted content and exit (no LLM summary)', false)
@@ -261,6 +261,7 @@ ${heading('Env Vars')}
   CLAUDE_PATH           optional (path to Claude CLI binary)
   CODEX_PATH            optional (path to Codex CLI binary)
   GEMINI_PATH           optional (path to Gemini CLI binary)
+  AGENT_PATH            optional (path to Cursor Agent CLI binary)
   SUMMARIZE_MODEL       optional (overrides default model selection)
   SUMMARIZE_THEME       optional (${CLI_THEME_NAMES.join(', ')})
   SUMMARIZE_TRUECOLOR   optional (force 24-bit color)
diff --git a/src/run/run-config.ts b/src/run/run-config.ts
index d70ebaa0..fe2a7cd2 100644
--- a/src/run/run-config.ts
+++ b/src/run/run-config.ts
@@ -57,7 +57,7 @@ export function resolveConfigState({
   const cliEnabledOverride: CliProvider[] | null = (() => {
     if (!cliFlagPresent || cliProviderArg) return null
     if (Array.isArray(config?.cli?.enabled)) return config.cli.enabled
-    return ['gemini', 'claude', 'codex']
+    return ['gemini', 'claude', 'codex', 'agent']
   })()
   const cliConfigForRun = cliEnabledOverride
     ? { ...(config?.cli ?? {}), enabled: cliEnabledOverride }
diff --git a/src/run/summary-engine.ts b/src/run/summary-engine.ts
index 88d97abf..92efb404 100644
--- a/src/run/summary-engine.ts
+++ b/src/run/summary-engine.ts
@@ -101,6 +101,9 @@ export function createSummaryEngine(deps: SummaryEngineDeps) {
     if (requiredEnv === 'CLI_GEMINI') {
       return Boolean(deps.cliAvailability.gemini)
     }
+    if (requiredEnv === 'CLI_AGENT') {
+      return Boolean(deps.cliAvailability.agent)
+    }
     if (requiredEnv === 'GEMINI_API_KEY') {
       return deps.keyFlags.googleConfigured
     }
@@ -129,6 +132,9 @@ export function createSummaryEngine(deps: SummaryEngineDeps) {
     if (attempt.requiredEnv === 'CLI_GEMINI') {
       return `Gemini CLI not found for model ${attempt.userModelId}. Install Gemini CLI or set GEMINI_PATH.`
     }
+    if (attempt.requiredEnv === 'CLI_AGENT') {
+      return `Cursor Agent CLI not found for model ${attempt.userModelId}. Install Cursor CLI or set AGENT_PATH.`
+    }
     return `Missing ${attempt.requiredEnv} for model ${attempt.userModelId}. Set the env var or choose a different --model.`
   }
 
diff --git a/src/run/types.ts b/src/run/types.ts
index a5fa8ba1..8f05b854 100644
--- a/src/run/types.ts
+++ b/src/run/types.ts
@@ -10,6 +10,7 @@ export type ModelAttemptRequiredEnv =
   | 'CLI_CLAUDE'
   | 'CLI_CODEX'
   | 'CLI_GEMINI'
+  | 'CLI_AGENT'
 
 export type ModelAttempt = {
   transport: 'native' | 'openrouter' | 'cli'
diff --git a/tests/llm.cli.more-branches-2.test.ts b/tests/llm.cli.more-branches-2.test.ts
index dadea2c2..81082c56 100644
--- a/tests/llm.cli.more-branches-2.test.ts
+++ b/tests/llm.cli.more-branches-2.test.ts
@@ -25,6 +25,7 @@ describe('llm/cli more branches', () => {
     )
 
     expect(resolveCliBinary('claude', null, {})).toBe('claude')
+    expect(resolveCliBinary('agent', null, {})).toBe('agent')
   })
 
   it('includes stderr in exec error messages', async () => {
diff --git a/tests/llm.cli.test.ts b/tests/llm.cli.test.ts
index e05ca854..75757768 100644
--- a/tests/llm.cli.test.ts
+++ b/tests/llm.cli.test.ts
@@ -146,6 +146,33 @@ describe('runCliModel', () => {
     expect(seen[0]).toContain('--bar')
   })
 
+  it('handles Agent CLI JSON output in ask mode', async () => {
+    const seen: string[][] = []
+    const execFileImpl = makeStub((args) => {
+      seen.push(args)
+      return { stdout: JSON.stringify({ result: 'ok' }) }
+    })
+    const result = await runCliModel({
+      provider: 'agent',
+      prompt: 'Test',
+      model: 'gpt-5.2',
+      allowTools: false,
+      timeoutMs: 1000,
+      env: {},
+      execFileImpl,
+      config: null,
+    })
+    expect(result.text).toBe('ok')
+    expect(seen[0]).toContain('--print')
+    expect(seen[0]).toContain('--output-format')
+    expect(seen[0]).toContain('json')
+    expect(seen[0]).toContain('--mode')
+    expect(seen[0]).toContain('ask')
+    expect(seen[0]).toContain('--model')
+    expect(seen[0]).toContain('gpt-5.2')
+    expect(seen[0]?.[seen[0].length - 1]).toBe('Test')
+  })
+
   it('reads the Codex output file', async () => {
     const execFileImpl: ExecFileFn = ((_cmd, args, _options, cb) => {
       const outputIndex = args.indexOf('--output-last-message')
diff --git a/tests/model-spec.test.ts b/tests/model-spec.test.ts
index 81d39293..bd6d8e0d 100644
--- a/tests/model-spec.test.ts
+++ b/tests/model-spec.test.ts
@@ -29,6 +29,15 @@ describe('model spec parsing', () => {
     expect(parsed.requiredEnv).toBe('CLI_CODEX')
   })
 
+  it('defaults agent cli models when missing', () => {
+    const parsed = parseRequestedModelId('cli/agent')
+    expect(parsed.kind).toBe('fixed')
+    expect(parsed.transport).toBe('cli')
+    expect(parsed.cliProvider).toBe('agent')
+    expect(parsed.cliModel).toBe('gpt-5.2')
+    expect(parsed.requiredEnv).toBe('CLI_AGENT')
+  })
+
   it('rejects invalid cli providers', () => {
     expect(() => parseRequestedModelId('cli/unknown/model')).toThrow(/Invalid CLI model id/)
   })