diff --git a/packages/gittensory-miner/.gittensory-miner.env.example b/packages/gittensory-miner/.gittensory-miner.env.example
new file mode 100644
index 0000000000..a00534f6e0
--- /dev/null
+++ b/packages/gittensory-miner/.gittensory-miner.env.example
@@ -0,0 +1,11 @@
+# Env file for docker-compose.miner.yml (#5177). Copy to `.gittensory-miner.env`, fill in real values, and do
+# NOT commit the filled-in copy. Values are intentionally EMPTY here (a real-looking value in a committed file
+# trips secret scanners). Compose reads `KEY=value` lines; leave a key blank or delete it if unused.
+#
+# Required: a GitHub token the miner uses to read issues and open PRs.
+GITHUB_TOKEN=
+# Optional: only for the coding-agent providers you enable (claude-cli / codex-cli / agent-sdk).
+ANTHROPIC_API_KEY=
+OPENAI_API_KEY=
+# Optional: override the on-container state dir (defaults to /data/miner, mapped to the miner-data volume).
+GITTENSORY_MINER_CONFIG_DIR=/data/miner
diff --git a/packages/gittensory-miner/DEPLOYMENT.md b/packages/gittensory-miner/DEPLOYMENT.md
index d0a5f06f0d..4e38dffa5c 100644
--- a/packages/gittensory-miner/DEPLOYMENT.md
+++ b/packages/gittensory-miner/DEPLOYMENT.md
@@ -2,13 +2,13 @@
 
 Two form factors for running `@jsonbored/gittensory-miner`: **laptop mode** (single machine, zero Docker) and **fleet mode** (containerized workers with a shared data volume). Both are 100% client-side for core operation — the miner never uploads source and never requires a hosted Gittensory callback to boot. Credentials (GitHub tokens, etc.) stay on the operator's machine or in their own secret store; nothing is baked into images.
 
-| | Laptop mode | Fleet mode |
-|---|---|---|
-| **Best for** | One contributor machine, local experimentation | Many parallel miner attempts on a host or small cluster |
-| **Dependencies** | Node.js `>=22.13.0` only | Docker (or compatible runtime) + Node image or custom image |
-| **State** | SQLite files under `~/.config/gittensory-miner/` (override with `GITTENSORY_MINER_CONFIG_DIR`) | Same SQLite layout on a mounted `/data` (or `GITTENSORY_MINER_CONFIG_DIR`) volume |
-| **Setup** | `npm install -g @jsonbored/gittensory-miner` or workspace build | `docker build` + `docker run` with env + volume (see below) |
-| **Footprint** | One Node process, local disk for ledgers/queues | One container per worker; scale horizontally by adding containers |
+|                  | Laptop mode                                                                                    | Fleet mode                                                                        |
+| ---------------- | ---------------------------------------------------------------------------------------------- | --------------------------------------------------------------------------------- |
+| **Best for**     | One contributor machine, local experimentation                                                 | Many parallel miner attempts on a host or small cluster                           |
+| **Dependencies** | Node.js `>=22.13.0` only                                                                       | Docker (or compatible runtime) + Node image or custom image                       |
+| **State**        | SQLite files under `~/.config/gittensory-miner/` (override with `GITTENSORY_MINER_CONFIG_DIR`) | Same SQLite layout on a mounted `/data` (or `GITTENSORY_MINER_CONFIG_DIR`) volume |
+| **Setup**        | `npm install -g @jsonbored/gittensory-miner` or workspace build                                | `docker build` + `docker run` with env + volume (see below)                       |
+| **Footprint**    | One Node process, local disk for ledgers/queues                                                | One container per worker; scale horizontally by adding containers                 |
 
 ## Laptop mode walkthrough
 
@@ -69,6 +69,17 @@ The image entrypoint is `gittensory-miner`; pass subcommands after the image nam
 
 The repo-root [`docker-compose.yml`](../../docker-compose.yml) documents the **self-hosted review stack** (the `gittensory` API/orb), not the miner CLI. Miners are clients of that stack (or of github.com directly) and do not require it to run locally.
 
+### Docker Compose (fleet mode)
+
+Instead of a hand-assembled `docker run`, [`docker-compose.miner.yml`](docker-compose.miner.yml) defines a long-lived `miner` service (built from this package's Dockerfile, `restart: unless-stopped`, state on a named `miner-data` volume). Credentials come from an env file, never inlined:
+
+```sh
+cp .gittensory-miner.env.example .gittensory-miner.env   # fill in GITHUB_TOKEN (+ optional provider keys)
+docker compose -f docker-compose.miner.yml up -d --build
+```
+
+**Scaling to N parallel workers.** `docker compose -f docker-compose.miner.yml up -d --scale miner=N` gives every replica the **same** `miner-data` volume — and the miner's SQLite ledgers are **not** safe for concurrent access, so N replicas on one volume will contend/corrupt. To run N **isolated** workers, give each its own state: run N separate compose projects (`docker compose -p miner-1 …`, `-p miner-2 …` — `-p` namespaces the volume) or point each at a distinct `GITTENSORY_MINER_CONFIG_DIR` on its own mount. For built-in isolated horizontal scaling, use the Kubernetes StatefulSet in [`k8s/`](../../k8s/) (per-pod volumes).
+
 ## Invariants
 
 - Core miner bookkeeping (claims, plans, queues, ledgers) works offline after install.
diff --git a/packages/gittensory-miner/docker-compose.miner.yml b/packages/gittensory-miner/docker-compose.miner.yml
new file mode 100644
index 0000000000..33bf3489fe
--- /dev/null
+++ b/packages/gittensory-miner/docker-compose.miner.yml
@@ -0,0 +1,40 @@
+# docker-compose for gittensory-miner (AMS) fleet mode (#5177).
+#
+# Runs the miner as a long-lived CLI worker instead of a hand-assembled `docker run`. Build context is the
+# MONOREPO ROOT (../..) because the Dockerfile needs the full workspace on disk before `npm ci` — see the
+# comments in packages/gittensory-miner/Dockerfile.
+#
+# Usage:
+#   1. Create the env file (never commit real values): cp .gittensory-miner.env.example .gittensory-miner.env
+#   2. Start one worker:  docker compose -f docker-compose.miner.yml up -d --build
+#
+# Scaling to N parallel workers:
+#   docker compose -f docker-compose.miner.yml up -d --scale miner=N
+#   BUT: `--scale` gives every replica the SAME `miner-data` volume, and the miner's SQLite ledgers
+#   (claim-ledger.sqlite3, plan-store.sqlite3, …) are NOT safe for concurrent multi-process access — N replicas
+#   sharing one volume WILL corrupt/contend on those files. To run N ISOLATED workers, give each its own state:
+#     • run N separate compose projects, each with its own volume:
+#         docker compose -p miner-1 -f docker-compose.miner.yml up -d
+#         docker compose -p miner-2 -f docker-compose.miner.yml up -d   # …etc; -p namespaces the volume
+#     • or point each worker at a distinct GITTENSORY_MINER_CONFIG_DIR on its own mount.
+#   (A single-shared-volume `--scale` is only safe for one active worker; Kubernetes StatefulSet per-pod PVCs, see
+#   k8s/, are the built-in answer for isolated horizontal scaling.)
+services:
+  miner:
+    build:
+      context: ../..
+      dockerfile: packages/gittensory-miner/Dockerfile
+    image: gittensory-miner:latest
+    # ENTRYPOINT is `gittensory-miner`; `run` is the continuous fleet-worker loop.
+    command: ["run"]
+    restart: unless-stopped
+    # Operator-supplied secrets/config (GITHUB_TOKEN, optional provider keys). Copy the .example, fill it in,
+    # and NEVER commit the real file — env vars stay out of the compose file and out of `docker inspect` args.
+    env_file:
+      - .gittensory-miner.env
+    environment:
+      GITTENSORY_MINER_CONFIG_DIR: /data/miner
+    volumes:
+      - miner-data:/data/miner
+volumes:
+  miner-data:
diff --git a/test/unit/miner-docker-compose.test.ts b/test/unit/miner-docker-compose.test.ts
new file mode 100644
index 0000000000..940e4226c9
--- /dev/null
+++ b/test/unit/miner-docker-compose.test.ts
@@ -0,0 +1,50 @@
+import { readFileSync } from "node:fs";
+import { join } from "node:path";
+import { describe, expect, it } from "vitest";
+import { parse } from "yaml";
+
+// Validation for the AMS fleet-mode compose file (#5177). Not `src/**` logic, so Codecov doesn't gate it — but
+// the structural contract (service built from the package Dockerfile, named volume for SQLite persistence,
+// restart policy, credentials via env-file not inlined) is asserted here as a real test, and the env example is
+// checked to ship only empty (secret-scanner-safe) placeholders.
+const MINER_DIR = join(process.cwd(), "packages/gittensory-miner");
+const compose = parse(
+  readFileSync(join(MINER_DIR, "docker-compose.miner.yml"), "utf8"),
+) as Record<string, any>;
+const envExample = readFileSync(
+  join(MINER_DIR, ".gittensory-miner.env.example"),
+  "utf8",
+);
+
+describe("docker-compose.miner.yml (#5177)", () => {
+  it("defines a miner service built from the package Dockerfile (monorepo-root context)", () => {
+    const miner = compose.services?.miner;
+    expect(miner).toBeTruthy();
+    expect(miner.build.dockerfile).toBe("packages/gittensory-miner/Dockerfile");
+    expect(miner.build.context).toBe("../..");
+    expect(miner.command).toContain("run");
+  });
+
+  it("persists state on a named volume and restarts unless stopped", () => {
+    const miner = compose.services.miner;
+    expect(miner.restart).toBe("unless-stopped");
+    expect(miner.volumes).toContain("miner-data:/data/miner");
+    expect(compose.volumes).toHaveProperty("miner-data");
+    expect(miner.environment.GITTENSORY_MINER_CONFIG_DIR).toBe("/data/miner");
+  });
+
+  it("sources credentials from an env file, never hardcoded in the compose", () => {
+    const miner = compose.services.miner;
+    expect(miner.env_file).toContain(".gittensory-miner.env");
+    // no secret-named key is assigned a value directly in the compose `environment` block
+    expect(JSON.stringify(miner.environment ?? {})).not.toMatch(
+      /TOKEN|API_KEY|SECRET|PASSWORD/i,
+    );
+  });
+
+  it("ships an env example with empty (scanner-safe) placeholder values for every credential", () => {
+    for (const key of ["GITHUB_TOKEN", "ANTHROPIC_API_KEY", "OPENAI_API_KEY"]) {
+      expect(envExample).toMatch(new RegExp(`^${key}=\\s*$`, "m"));
+    }
+  });
+});