diff --git a/packages/opencode/src/altimate/tool-label.ts b/packages/opencode/src/altimate/tool-label.ts
new file mode 100644
index 000000000..05379da66
--- /dev/null
+++ b/packages/opencode/src/altimate/tool-label.ts
@@ -0,0 +1,89 @@
+/**
+ * Produces a readable, dbt-aware title for a tool call — e.g. "Reading customers
+ * model" instead of a bare file path — so any client (chat webview, TUI, ...) can
+ * render a descriptive label straight from the tool part's `state.title`.
+ *
+ * This is the source of truth for tool-call labels: it runs inside the tool
+ * execute() wrapper (see `tool/tool.ts`) and rewrites the title every tool
+ * returns. Only file-acting tools (whose native title is a bare path) are
+ * rewritten; every other tool keeps the rich title it already emits.
+ *
+ * dbt naming ("model"/"seed"/...) is applied only when the path sits under the
+ * matching directory, so it degrades to the plain filename off-dbt.
+ */
+
+/** File-acting tools whose native title is a bare path → gerund verb. */
+const FILE_TOOL_VERBS: Record<string, string> = {
+  read: "Reading",
+  write: "Writing",
+  edit: "Editing",
+  multiedit: "Editing",
+  glob: "Searching",
+  grep: "Searching",
+  list: "Listing",
+}
+
+/** dbt directory → singular noun used in the label. */
+const DBT_DIR_KIND: Record<string, string> = {
+  models: "model",
+  seeds: "seed",
+  macros: "macro",
+  snapshots: "snapshot",
+  tests: "test",
+  analyses: "analysis",
+  analysis: "analysis",
+}
+
+function asString(value: unknown): string | undefined {
+  return typeof value === "string" && value.trim() ? value : undefined
+}
+
+/**
+ * Turn a file path into a friendly target:
+ *  - under a known dbt dir → "<name> <kind>" with the sql/yaml/csv extension stripped
+ *  - otherwise → the basename, extension kept (e.g. "dbt_project.yml", "index.ts")
+ */
+function friendlyTarget(rawPath: string): string {
+  const segments = rawPath.replace(/\\/g, "/").replace(/^\.\//, "").split("/").filter(Boolean)
+  const base = segments[segments.length - 1] ?? rawPath
+  for (const segment of segments.slice(0, -1)) {
+    const kind = DBT_DIR_KIND[segment.toLowerCase()]
+    if (kind) {
+      const name = base.replace(/\.(sql|ya?ml|csv)$/i, "")
+      return `${name} ${kind}`
+    }
+  }
+  return base
+}
+
+/** Extract the display target for a given file tool from its input args. */
+function fileTarget(tool: string, input: Record<string, unknown>): string | undefined {
+  if (tool === "glob" || tool === "grep") {
+    return asString(input["pattern"])
+  }
+  if (tool === "list") {
+    const path = asString(input["path"])
+    return path ? friendlyTarget(path) : undefined
+  }
+  // read / write / edit / multiedit
+  const filePath = asString(input["filePath"]) ?? asString(input["path"])
+  return filePath ? friendlyTarget(filePath) : undefined
+}
+
+/**
+ * @param tool     the tool id (e.g. "read", "sql_analyze")
+ * @param input    the tool's input args
+ * @param rawTitle the title the tool itself returned (a bare path for file tools,
+ *                 already human-readable for everything else)
+ * @returns a humanized label for file tools, otherwise the tool's own title.
+ */
+export function describeToolCall(tool: string, input: unknown, rawTitle?: string): string | undefined {
+  const fallback = asString(rawTitle)
+  const verb = FILE_TOOL_VERBS[tool]
+  if (verb && input && typeof input === "object") {
+    const target = fileTarget(tool, input as Record<string, unknown>)
+    if (target) return `${verb} ${target}`
+  }
+  // Non-file / rich-title tools: keep the title the tool already emitted.
+  return fallback
+}
diff --git a/packages/opencode/src/altimate/tool-source.ts b/packages/opencode/src/altimate/tool-source.ts
new file mode 100644
index 000000000..a06e5742c
--- /dev/null
+++ b/packages/opencode/src/altimate/tool-source.ts
@@ -0,0 +1,87 @@
+/**
+ * Authoritative classification of a tool call's origin, stamped onto the tool
+ * part's `state.metadata.source` so clients (chat webview, ...) render the right
+ * badge without re-deriving it from tool-name prefixes.
+ *
+ *  - "builtin"  — native opencode tools (read/glob/bash/...)
+ *  - "altimate" — Altimate-provided tools (sql_*, schema_*, finops_*, ...) AND
+ *                 tools from the Datamates MCP server (Altimate-owned, just
+ *                 delivered over MCP)
+ *  - "mcp"      — third-party MCP tools
+ *
+ * Registry tools and MCP tools are resolved in separate loops (see
+ * `session/prompt.ts` resolveTools), so each has its own classifier. The native
+ * `skill` tool is a further special case: it loads skills of varying origin, so
+ * its badge is classified per-call from the loaded skill's origin (see
+ * `skillToolSource`) rather than from the tool id.
+ */
+export type ToolSource = "builtin" | "altimate" | "mcp"
+
+/**
+ * Native opencode tool ids. This set is small and stable; every other tool in
+ * the registry is Altimate-provided, so new Altimate tools classify correctly
+ * with no per-tool maintenance here.
+ */
+const NATIVE_TOOL_IDS = new Set<string>([
+  "invalid",
+  "question",
+  "bash",
+  "read",
+  "glob",
+  "grep",
+  "list",
+  "edit",
+  "write",
+  "multiedit",
+  "task",
+  "webfetch",
+  "todowrite",
+  "todoread",
+  "websearch",
+  "codesearch",
+  "skill",
+  "apply_patch",
+  "lsp",
+  "plan_exit",
+  "plan_enter",
+  "StructuredOutput",
+])
+
+/** MCP client-name prefixes that are Altimate-owned (Datamates as an MCP server). */
+const ALTIMATE_MCP_PREFIXES = ["datamate"]
+
+/** Classify a registry tool (never an MCP tool) as builtin vs Altimate. */
+export function registryToolSource(id: string): ToolSource {
+  return NATIVE_TOOL_IDS.has(id) ? "builtin" : "altimate"
+}
+
+/** Classify an MCP tool by its `<client>_<tool>` key: Altimate (Datamates) vs third-party. */
+export function mcpToolSource(key: string): ToolSource {
+  const lower = key.toLowerCase()
+  return ALTIMATE_MCP_PREFIXES.some((p) => lower.startsWith(p)) ? "altimate" : "mcp"
+}
+
+/**
+ * Classify a skill-load (the native `skill` tool) by the loaded skill's origin,
+ * which the skill tool reports on its metadata (see `tool/skill.ts`). Altimate
+ * ships its skills bundled with the CLI ("builtin" origin) — those wear the
+ * Altimate mark. User-authored global/project skills stay neutral so the badge
+ * doesn't over-claim third-party or personal skills. Origin arrives as `unknown`
+ * (client metadata), so anything other than "builtin" is treated as neutral.
+ */
+export function skillToolSource(origin: unknown): ToolSource {
+  return origin === "builtin" ? "altimate" : "builtin"
+}
+
+/**
+ * Best-effort readable title for an MCP tool call, from its `<client>_<tool>`
+ * key — e.g. "datamates_jira_get_issue" → "Jira Get Issue". Strips the leading
+ * client segment and Title-Cases the rest. (Richer per-call titles are the MCP
+ * server's job; this is the fallback so MCP rows aren't a bare snake_case id.)
+ */
+export function humanizeMcpTitle(key: string): string {
+  const withoutClient = key.includes("_") ? key.slice(key.indexOf("_") + 1) : key
+  const words = (withoutClient || key).split(/[_-]+/).filter(Boolean)
+  if (words.length === 0) return key
+  return words.map((w) => w.charAt(0).toUpperCase() + w.slice(1)).join(" ")
+}
diff --git a/packages/opencode/src/session/prompt.ts b/packages/opencode/src/session/prompt.ts
index 72027eedf..44fcb4015 100644
--- a/packages/opencode/src/session/prompt.ts
+++ b/packages/opencode/src/session/prompt.ts
@@ -65,6 +65,8 @@ import { registerAltimateValidators } from "../altimate/validators"
 registerAltimateValidators()
 import { Config } from "../config/config"
 import { Tracer } from "../altimate/observability/tracing"
+// altimate_change — stamp an authoritative tool source + humanized MCP title
+import { registryToolSource, mcpToolSource, humanizeMcpTitle, skillToolSource } from "../altimate/tool-source"
 // altimate_change end
 import { Telemetry } from "@/telemetry" // altimate_change — session telemetry
 
@@ -1564,6 +1566,14 @@ export namespace SessionPrompt {
               messageID: input.processor.message.id,
             })),
           }
+          // altimate_change — stamp authoritative tool source so clients render the right badge.
+          // The `skill` tool loads skills of varying origin, so classify it per-call from the
+          // origin it reports (Altimate-shipped → altimate mark, user global/project → neutral).
+          const metadata = output.metadata ?? {}
+          output.metadata = {
+            ...metadata,
+            source: item.id === "skill" ? skillToolSource(metadata.skillOrigin) : registryToolSource(item.id),
+          }
           await Plugin.trigger(
             "tool.execute.after",
             {
@@ -1655,10 +1665,13 @@ export namespace SessionPrompt {
           ...(result.metadata ?? {}),
           truncated: truncated.truncated,
           ...(truncated.truncated && { outputPath: truncated.outputPath }),
+          // altimate_change — authoritative source so the chat can badge Datamates MCP tools
+          source: mcpToolSource(key),
         }
 
         return {
-          title: "",
+          // altimate_change — MCP tools have no native title; give a readable label
+          title: humanizeMcpTitle(key),
           metadata,
           output: truncated.content,
           attachments: attachments.map((attachment) => ({
diff --git a/packages/opencode/src/tool/skill.ts b/packages/opencode/src/tool/skill.ts
index 78ea4d645..5b5ab5ed2 100644
--- a/packages/opencode/src/tool/skill.ts
+++ b/packages/opencode/src/tool/skill.ts
@@ -17,10 +17,15 @@ import os from "os"
 
 const MAX_DISPLAY_SKILLS = 50
 
-// altimate_change start — classifySkillSource helper for skill telemetry
-function classifySkillSource(location: string): "builtin" | "global" | "project" {
-  if (location.includes("node_modules") || location.includes(".altimate/builtin")) return "builtin"
-  if (location.startsWith(os.homedir())) return "global"
+// altimate_change start — classifySkillSource helper for skill telemetry + source badge
+export function classifySkillSource(location: string): "builtin" | "global" | "project" {
+  // Normalize separators so `.altimate/builtin` / homedir prefix match on Windows too.
+  const normalized = location.replace(/\\/g, "/")
+  // Embedded skills load with a `builtin:<name>/SKILL.md` location and Altimate's
+  // bundled skills land under `~/.altimate/builtin/` — both are Altimate-shipped.
+  if (normalized.startsWith("builtin:") || normalized.includes("node_modules") || normalized.includes(".altimate/builtin"))
+    return "builtin"
+  if (normalized.startsWith(os.homedir().replace(/\\/g, "/"))) return "global"
   return "project"
 }
 // altimate_change end
@@ -147,6 +152,10 @@ export const SkillTool = Tool.define("skill", async (ctx) => {
       const followups = SkillFollowups.format(skill.name)
       // altimate_change end
 
+      // altimate_change start — classify origin once, reused for telemetry and the source badge
+      const skillOrigin = classifySkillSource(skill.location)
+      // altimate_change end
+
       // altimate_change start — telemetry instrumentation for skill loading with trigger classification
       try {
         Telemetry.track({
@@ -155,7 +164,7 @@ export const SkillTool = Tool.define("skill", async (ctx) => {
           session_id: ctx.sessionID,
           message_id: ctx.messageID,
           skill_name: skill.name,
-          skill_source: classifySkillSource(skill.location),
+          skill_source: skillOrigin,
           duration_ms: Date.now() - startTime,
           trigger: Telemetry.classifySkillTrigger(ctx.extra),
           has_followups: followups.length > 0,
@@ -188,6 +197,8 @@ export const SkillTool = Tool.define("skill", async (ctx) => {
         metadata: {
           name: skill.name,
           dir,
+          // altimate_change — origin drives the source badge (see altimate/tool-source.ts skillToolSource)
+          skillOrigin,
         },
       }
       // altimate_change end
diff --git a/packages/opencode/src/tool/tool.ts b/packages/opencode/src/tool/tool.ts
index 5daa021eb..ab59e75ef 100644
--- a/packages/opencode/src/tool/tool.ts
+++ b/packages/opencode/src/tool/tool.ts
@@ -7,6 +7,9 @@ import { Truncate } from "./truncation"
 // altimate_change start — telemetry instrumentation for tool execution
 import { Telemetry } from "../altimate/telemetry"
 // altimate_change end
+// altimate_change start — humanize tool-call titles at the source
+import { describeToolCall } from "../altimate/tool-label"
+// altimate_change end
 
 export namespace Tool {
   interface Metadata {
@@ -121,6 +124,10 @@ export namespace Tool {
             }
             throw error
           }
+          // altimate_change start — humanize the tool-call title at the source so any
+          // client (chat webview, TUI, ...) can render a readable label from state.title.
+          result = { ...result, title: describeToolCall(id, args, result.title) ?? result.title }
+          // altimate_change end
           // Telemetry runs after execute() succeeds — wrapped so it never breaks the tool
           try {
             const isSoftFailure = result.metadata?.success === false
diff --git a/packages/opencode/test/altimate/tool-label.test.ts b/packages/opencode/test/altimate/tool-label.test.ts
new file mode 100644
index 000000000..a8c68f0af
--- /dev/null
+++ b/packages/opencode/test/altimate/tool-label.test.ts
@@ -0,0 +1,52 @@
+import { describe, test, expect } from "bun:test"
+import { describeToolCall } from "../../src/altimate/tool-label"
+
+describe("describeToolCall", () => {
+  test("humanizes reads of a dbt model into 'Reading <name> model'", () => {
+    expect(describeToolCall("read", { filePath: "models/customers.sql" }, "models/customers.sql")).toBe(
+      "Reading customers model",
+    )
+    expect(
+      describeToolCall("read", { filePath: "models/staging/stg_customers.sql" }, "models/staging/stg_customers.sql"),
+    ).toBe("Reading stg_customers model")
+  })
+
+  test("maps other dbt directories to their noun", () => {
+    expect(describeToolCall("edit", { filePath: "macros/cents_to_dollars.sql" }, "macros/cents_to_dollars.sql")).toBe(
+      "Editing cents_to_dollars macro",
+    )
+    expect(describeToolCall("write", { filePath: "analyses/rollup.sql" }, "analyses/rollup.sql")).toBe(
+      "Writing rollup analysis",
+    )
+    expect(describeToolCall("read", { filePath: "seeds/raw_customers.csv" }, "seeds/raw_customers.csv")).toBe(
+      "Reading raw_customers seed",
+    )
+  })
+
+  test("falls back to the filename for non-dbt paths (never a false 'model')", () => {
+    expect(describeToolCall("read", { filePath: "dbt_project.yml" }, "dbt_project.yml")).toBe("Reading dbt_project.yml")
+    expect(describeToolCall("read", { filePath: "src/index.ts" }, "src/index.ts")).toBe("Reading index.ts")
+  })
+
+  test("labels glob / grep / list by their target", () => {
+    expect(describeToolCall("glob", { pattern: "**/*.sql" }, "12 matches")).toBe("Searching **/*.sql")
+    expect(describeToolCall("grep", { pattern: "customer_id" }, "3 matches")).toBe("Searching customer_id")
+    expect(describeToolCall("list", { path: "models" }, "models/")).toBe("Listing models")
+  })
+
+  test("keeps the tool's own title for non-file / rich-title tools", () => {
+    expect(
+      describeToolCall("sql_analyze", { filePath: "models/customers.sql" }, "Analyze: 2 issues [high]"),
+    ).toBe("Analyze: 2 issues [high]")
+    expect(describeToolCall("bash", { command: "dbt build" }, "Run full dbt build")).toBe("Run full dbt build")
+    // apply_patch carries a diff, not a path, so it keeps its own per-file title.
+    expect(describeToolCall("apply_patch", { patch: "*** Update File: models/x.sql" }, "# Patched x.sql")).toBe(
+      "# Patched x.sql",
+    )
+  })
+
+  test("falls back to the raw title when a file tool has no usable path", () => {
+    expect(describeToolCall("read", {}, "some title")).toBe("some title")
+    expect(describeToolCall("read", undefined, "some title")).toBe("some title")
+  })
+})
diff --git a/packages/opencode/test/altimate/tool-source.test.ts b/packages/opencode/test/altimate/tool-source.test.ts
new file mode 100644
index 000000000..e9d2d2d08
--- /dev/null
+++ b/packages/opencode/test/altimate/tool-source.test.ts
@@ -0,0 +1,57 @@
+import { describe, test, expect } from "bun:test"
+import { registryToolSource, mcpToolSource, humanizeMcpTitle, skillToolSource } from "../../src/altimate/tool-source"
+
+describe("registryToolSource", () => {
+  test("native opencode tools → builtin", () => {
+    for (const id of ["read", "write", "edit", "glob", "grep", "list", "bash", "task", "skill", "apply_patch"]) {
+      expect(registryToolSource(id)).toBe("builtin")
+    }
+  })
+
+  test("any non-native registry tool → altimate (incl. tools not enumerated here)", () => {
+    for (const id of ["sql_analyze", "schema_inspect", "finops_query_history", "altimate_core_check", "data_diff", "some_new_altimate_tool"]) {
+      expect(registryToolSource(id)).toBe("altimate")
+    }
+  })
+})
+
+describe("skillToolSource", () => {
+  test("Altimate-shipped (builtin origin) skills → altimate", () => {
+    expect(skillToolSource("builtin")).toBe("altimate")
+  })
+
+  test("user-authored global/project skills → builtin (neutral)", () => {
+    expect(skillToolSource("global")).toBe("builtin")
+    expect(skillToolSource("project")).toBe("builtin")
+  })
+
+  test("missing or unexpected origin → builtin (neutral, never over-claims)", () => {
+    expect(skillToolSource(undefined)).toBe("builtin")
+    expect(skillToolSource(null)).toBe("builtin")
+    expect(skillToolSource("")).toBe("builtin")
+    expect(skillToolSource(42)).toBe("builtin")
+  })
+})
+
+describe("mcpToolSource", () => {
+  test("Datamates MCP tools → altimate", () => {
+    expect(mcpToolSource("datamates_jira_get_issue")).toBe("altimate")
+    expect(mcpToolSource("datamate_snowflake_query")).toBe("altimate")
+  })
+
+  test("third-party MCP tools → mcp", () => {
+    expect(mcpToolSource("github_search_issues")).toBe("mcp")
+    expect(mcpToolSource("linear_create_issue")).toBe("mcp")
+  })
+})
+
+describe("humanizeMcpTitle", () => {
+  test("strips the client segment and Title-Cases the rest", () => {
+    expect(humanizeMcpTitle("datamates_jira_get_issue")).toBe("Jira Get Issue")
+    expect(humanizeMcpTitle("github_search_issues")).toBe("Search Issues")
+  })
+
+  test("falls back gracefully for single-segment keys", () => {
+    expect(humanizeMcpTitle("ping")).toBe("Ping")
+  })
+})
diff --git a/packages/opencode/test/tool/skill-source.test.ts b/packages/opencode/test/tool/skill-source.test.ts
new file mode 100644
index 000000000..add296dc6
--- /dev/null
+++ b/packages/opencode/test/tool/skill-source.test.ts
@@ -0,0 +1,102 @@
+import { afterEach, describe, test, expect } from "bun:test"
+import path from "path"
+import os from "os"
+import fs from "fs/promises"
+import { SkillTool, classifySkillSource } from "../../src/tool/skill"
+import { skillToolSource } from "../../src/altimate/tool-source"
+import { Instance } from "../../src/project/instance"
+import { tmpdir } from "../fixture/fixture"
+import { SessionID, MessageID } from "../../src/session/schema"
+
+const ctx = {
+  sessionID: SessionID.make("ses_test-skill-source"),
+  messageID: MessageID.make(""),
+  callID: "",
+  agent: "build",
+  abort: AbortSignal.any([]),
+  messages: [],
+  metadata: () => {},
+  ask: async () => {},
+}
+
+describe("classifySkillSource", () => {
+  test("Altimate-shipped locations → builtin", () => {
+    expect(classifySkillSource("builtin:data-viz/SKILL.md")).toBe("builtin")
+    expect(classifySkillSource("/home/x/.altimate/builtin/dbt-analyze/SKILL.md")).toBe("builtin")
+    expect(classifySkillSource("/app/node_modules/@altimateai/pkg/skills/x/SKILL.md")).toBe("builtin")
+    // Windows-style separators must still match the Altimate-builtin marker.
+    expect(classifySkillSource("C:\\Users\\x\\.altimate\\builtin\\dbt-analyze\\SKILL.md")).toBe("builtin")
+  })
+
+  test("skills under the user's home (but not Altimate builtin) → global", () => {
+    expect(classifySkillSource(path.join(os.homedir(), ".claude", "skills", "mine", "SKILL.md"))).toBe("global")
+  })
+
+  test("skills elsewhere (project checkout) → project", () => {
+    expect(classifySkillSource("/work/repo/.claude/skills/local/SKILL.md")).toBe("project")
+  })
+})
+
+describe("skill tool stamps origin that drives the source badge", () => {
+  afterEach(async () => {
+    await Instance.disposeAll()
+  })
+
+  test("a real project skill load reports origin=project → neutral (builtin) badge", async () => {
+    await using tmp = await tmpdir()
+    // Lay down a project-level skill the way Claude Code / opencode discover them.
+    const skillDir = path.join(tmp.path, ".claude", "skills", "e2e-probe")
+    await fs.mkdir(skillDir, { recursive: true })
+    await fs.writeFile(
+      path.join(skillDir, "SKILL.md"),
+      ["---", "name: e2e-probe", "description: probe skill for source-badge test", "---", "", "Probe body."].join("\n"),
+    )
+
+    await Instance.provide({
+      directory: tmp.path,
+      fn: async () => {
+        const skill = await SkillTool.init()
+        const result = await skill.execute({ name: "e2e-probe" }, ctx)
+
+        // The tool now carries the loaded skill's origin on its metadata...
+        expect(result.metadata.skillOrigin).toBe("project")
+        // ...and the badge policy maps a user/project skill to the neutral badge.
+        expect(skillToolSource(result.metadata.skillOrigin)).toBe("builtin")
+        // The humanized title path is unaffected.
+        expect(result.title).toBe("Loaded skill: e2e-probe")
+      },
+    })
+  })
+
+  test("a real Altimate-shipped (~/.altimate/builtin) skill load → origin=builtin → altimate badge", async () => {
+    await using tmp = await tmpdir()
+    // Seed an Altimate-shipped skill in an isolated home's builtin dir, mirroring
+    // how postinstall lays bundled skills under ~/.altimate/builtin/.
+    const prevHome = process.env["OPENCODE_TEST_HOME"]
+    const home = path.join(tmp.path, "home")
+    const builtinSkillDir = path.join(home, ".altimate", "builtin", "e2e-builtin-probe")
+    await fs.mkdir(builtinSkillDir, { recursive: true })
+    await fs.writeFile(
+      path.join(builtinSkillDir, "SKILL.md"),
+      ["---", "name: e2e-builtin-probe", "description: bundled probe skill", "---", "", "Bundled body."].join("\n"),
+    )
+    process.env["OPENCODE_TEST_HOME"] = home
+    try {
+      await Instance.provide({
+        directory: tmp.path,
+        fn: async () => {
+          const skill = await SkillTool.init()
+          const result = await skill.execute({ name: "e2e-builtin-probe" }, ctx)
+
+          // A bundled skill is classified as builtin origin...
+          expect(result.metadata.skillOrigin).toBe("builtin")
+          // ...which the badge policy promotes to the Altimate mark.
+          expect(skillToolSource(result.metadata.skillOrigin)).toBe("altimate")
+        },
+      })
+    } finally {
+      if (prevHome === undefined) delete process.env["OPENCODE_TEST_HOME"]
+      else process.env["OPENCODE_TEST_HOME"] = prevHome
+    }
+  })
+})
diff --git a/packages/opencode/test/tool/write.test.ts b/packages/opencode/test/tool/write.test.ts
index 97939c105..0d89f251e 100644
--- a/packages/opencode/test/tool/write.test.ts
+++ b/packages/opencode/test/tool/write.test.ts
@@ -328,7 +328,7 @@ describe("tool.write", () => {
   })
 
   describe("title generation", () => {
-    test("returns relative path as title", async () => {
+    test("humanizes the title to a readable label", async () => {
       await using tmp = await tmpdir()
       const filepath = path.join(tmp.path, "src", "components", "Button.tsx")
       await fs.mkdir(path.dirname(filepath), { recursive: true })
@@ -345,7 +345,10 @@ describe("tool.write", () => {
             ctx,
           )
 
-          expect(result.title).toEndWith(path.join("src", "components", "Button.tsx"))
+          // The execute() wrapper humanizes file-tool titles at the source
+          // (see src/altimate/tool-label.ts) — a non-dbt path degrades to the
+          // filename, so the title is a readable "Writing <file>" label.
+          expect(result.title).toBe("Writing Button.tsx")
         },
       })
     })