feat: add models.dev-backed model capabilities

src/cli/cli-program.ts

@@ -3,6 +3,7 @@ import { install } from "./install"
 import { run } from "./run"
 import { getLocalVersion } from "./get-local-version"
 import { doctor } from "./doctor"
+import { refreshModelCapabilities } from "./refresh-model-capabilities"
 import { createMcpOAuthCommand } from "./mcp-oauth"
 import type { InstallArgs } from "./types"
 import type { RunOptions } from "./run"
@@ -176,6 +177,21 @@ Examples:
     process.exit(exitCode)
   })
 
+program
+  .command("refresh-model-capabilities")
+  .description("Refresh the cached models.dev-based model capabilities snapshot")
+  .option("-d, --directory <path>", "Working directory to read oh-my-opencode config from")
+  .option("--source-url <url>", "Override the models.dev source URL")
+  .option("--json", "Output refresh summary as JSON")
+  .action(async (options) => {
+    const exitCode = await refreshModelCapabilities({
+      directory: options.directory,
+      sourceUrl: options.sourceUrl,
+      json: options.json ?? false,
+    })
+    process.exit(exitCode)
+  })
+
 program
   .command("version")
   .description("Show version information")

src/cli/refresh-model-capabilities.test.ts

@@ -0,0 +1,114 @@
+import { describe, expect, it, mock } from "bun:test"
+
+import { refreshModelCapabilities } from "./refresh-model-capabilities"
+
+describe("refreshModelCapabilities", () => {
+  it("uses config source_url when CLI override is absent", async () => {
+    const loadConfig = mock(() => ({
+      model_capabilities: {
+        source_url: "https://mirror.example/api.json",
+      },
+    }))
+    const refreshCache = mock(async () => ({
+      generatedAt: "2026-03-25T00:00:00.000Z",
+      sourceUrl: "https://mirror.example/api.json",
+      models: {
+        "gpt-5.4": { id: "gpt-5.4" },
+      },
+    }))
+    let stdout = ""
+
+    const exitCode = await refreshModelCapabilities(
+      { directory: "/repo", json: false },
+      {
+        loadConfig,
+        refreshCache,
+        stdout: {
+          write: (chunk: string) => {
+            stdout += chunk
+            return true
+          },
+        } as never,
+        stderr: {
+          write: () => true,
+        } as never,
+      },
+    )
+
+    expect(exitCode).toBe(0)
+    expect(loadConfig).toHaveBeenCalledWith("/repo", null)
+    expect(refreshCache).toHaveBeenCalledWith({
+      sourceUrl: "https://mirror.example/api.json",
+    })
+    expect(stdout).toContain("Refreshed model capabilities cache (1 models)")
+  })
+
+  it("CLI sourceUrl overrides config and supports json output", async () => {
+    const refreshCache = mock(async () => ({
+      generatedAt: "2026-03-25T00:00:00.000Z",
+      sourceUrl: "https://override.example/api.json",
+      models: {
+        "gpt-5.4": { id: "gpt-5.4" },
+        "claude-opus-4-6": { id: "claude-opus-4-6" },
+      },
+    }))
+    let stdout = ""
+
+    const exitCode = await refreshModelCapabilities(
+      {
+        directory: "/repo",
+        json: true,
+        sourceUrl: "https://override.example/api.json",
+      },
+      {
+        loadConfig: () => ({}),
+        refreshCache,
+        stdout: {
+          write: (chunk: string) => {
+            stdout += chunk
+            return true
+          },
+        } as never,
+        stderr: {
+          write: () => true,
+        } as never,
+      },
+    )
+
+    expect(exitCode).toBe(0)
+    expect(refreshCache).toHaveBeenCalledWith({
+      sourceUrl: "https://override.example/api.json",
+    })
+    expect(JSON.parse(stdout)).toEqual({
+      sourceUrl: "https://override.example/api.json",
+      generatedAt: "2026-03-25T00:00:00.000Z",
+      modelCount: 2,
+    })
+  })
+
+  it("returns exit code 1 when refresh fails", async () => {
+    let stderr = ""
+
+    const exitCode = await refreshModelCapabilities(
+      { directory: "/repo" },
+      {
+        loadConfig: () => ({}),
+        refreshCache: async () => {
+          throw new Error("boom")
+        },
+        stdout: {
+          write: () => true,
+        } as never,
+        stderr: {
+          write: (chunk: string) => {
+            stderr += chunk
+            return true
+          },
+        } as never,
+      },
+    )
+
+    expect(exitCode).toBe(1)
+    expect(stderr).toContain("Failed to refresh model capabilities cache")
+  })
+})

src/cli/refresh-model-capabilities.ts

@@ -0,0 +1,51 @@
+import { loadPluginConfig } from "../plugin-config"
+import { refreshModelCapabilitiesCache } from "../shared/model-capabilities-cache"
+
+export type RefreshModelCapabilitiesOptions = {
+  directory?: string
+  json?: boolean
+  sourceUrl?: string
+}
+
+type RefreshModelCapabilitiesDeps = {
+  loadConfig?: typeof loadPluginConfig
+  refreshCache?: typeof refreshModelCapabilitiesCache
+  stdout?: Pick<typeof process.stdout, "write">
+  stderr?: Pick<typeof process.stderr, "write">
+}
+
+export async function refreshModelCapabilities(
+  options: RefreshModelCapabilitiesOptions,
+  deps: RefreshModelCapabilitiesDeps = {},
+): Promise<number> {
+  const directory = options.directory ?? process.cwd()
+  const loadConfig = deps.loadConfig ?? loadPluginConfig
+  const refreshCache = deps.refreshCache ?? refreshModelCapabilitiesCache
+  const stdout = deps.stdout ?? process.stdout
+  const stderr = deps.stderr ?? process.stderr
+
+  try {
+    const config = loadConfig(directory, null)
+    const sourceUrl = options.sourceUrl ?? config.model_capabilities?.source_url
+    const snapshot = await refreshCache({ sourceUrl })
+
+    const summary = {
+      sourceUrl: snapshot.sourceUrl,
+      generatedAt: snapshot.generatedAt,
+      modelCount: Object.keys(snapshot.models).length,
+    }
+
+    if (options.json) {
+      stdout.write(`${JSON.stringify(summary, null, 2)}\n`)
+    } else {
+      stdout.write(
+        `Refreshed model capabilities cache (${summary.modelCount} models) from ${summary.sourceUrl}\n`,
+      )
+    }
+
+    return 0
+  } catch (error) {
+    stderr.write(`Failed to refresh model capabilities cache: ${String(error)}\n`)
+    return 1
+  }
+}