diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index be06bd4..a837d3b 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -1,7 +1,6 @@
 # PR and main-branch CI — lint and test only (no secrets, no PyPI OIDC).
-# Keep install/lint/test steps in sync with publish-pypi.yml test job until issue #7
-# (reusable workflow) lands. PR CI also matrices Python versions; publish stays
-# single-version as a release gate (see docs/TESTING.md).
+# Lint/test steps live in reusable-test.yml (issue #17). PR CI matrices Python
+# versions; publish stays single-version as a release gate (see docs/TESTING.md).
 
 name: CI
 
@@ -21,46 +20,21 @@ concurrency:
 jobs:
   lint-test:
     name: Python ${{ matrix.python-version }}
-    runs-on: ubuntu-latest
     strategy:
       fail-fast: true
       matrix:
         python-version: ["3.10", "3.11", "3.12", "3.13"]
-    steps:
-      - uses: actions/checkout@v4
-      - uses: actions/setup-python@v5
-        with:
-          python-version: ${{ matrix.python-version }}
-      - name: Install dev dependencies
-        run: |
-          python -m pip install --upgrade pip
-          pip install -e ".[dev]"
-      - name: Dependency audit (warn-only)
-        continue-on-error: true
-        run: |
-          pip install pip-audit
-          pip-audit
-      - name: black
-        run: black --check aura tests integrations examples
-      - name: flake8
-        run: flake8 aura tests integrations examples
-      - name: pytest
-        run: pytest --cov=aura --cov-report=term-missing --ignore=tests/integration
+    uses: ./.github/workflows/reusable-test.yml
+    with:
+      python-version: ${{ matrix.python-version }}
+      pip-audit: true
 
   skillware-live:
     name: Skillware registry (live)
-    runs-on: ubuntu-latest
-    steps:
-      - uses: actions/checkout@v4
-      - uses: actions/setup-python@v5
-        with:
-          python-version: "3.12"
-      - name: Install with Skillware extra
-        run: |
-          python -m pip install --upgrade pip
-          pip install -e ".[dev,skillware]"
-      - name: pytest skillware
-        run: pytest tests/test_skillware_integration.py -v
+    uses: ./.github/workflows/reusable-test.yml
+    with:
+      python-version: "3.12"
+      skillware: true
 
   # Stable check name for branch protection (matrix cells are "Python 3.xx").
   ci-ok:
diff --git a/.github/workflows/publish-pypi.yml b/.github/workflows/publish-pypi.yml
index d3036ff..8029afd 100644
--- a/.github/workflows/publish-pypi.yml
+++ b/.github/workflows/publish-pypi.yml
@@ -21,22 +21,11 @@ permissions:
   contents: read
 
 jobs:
-  # Commands must match .github/workflows/ci.yml (see docs/TESTING.md).
-  # PR CI matrices 3.10–3.13; this job stays on 3.12 as a single-version release gate.
+  # Same lint/test as PR CI via reusable-test.yml (Python 3.12 release gate).
   test:
-    runs-on: ubuntu-latest
-    steps:
-      - uses: actions/checkout@v4
-      - uses: actions/setup-python@v5
-        with:
-          python-version: "3.12"
-      - name: Install and test
-        run: |
-          python -m pip install --upgrade pip
-          pip install -e ".[dev]"
-          black --check aura tests integrations examples
-          flake8 aura tests
-          pytest --cov=aura --cov-report=term-missing
+    uses: ./.github/workflows/reusable-test.yml
+    with:
+      python-version: "3.12"
 
   publish:
     needs: test
diff --git a/.github/workflows/reusable-test.yml b/.github/workflows/reusable-test.yml
new file mode 100644
index 0000000..4462432
--- /dev/null
+++ b/.github/workflows/reusable-test.yml
@@ -0,0 +1,65 @@
+# Callable lint + test job — single source for PR CI and PyPI publish (issue #17).
+# Callers: ci.yml (matrix + skillware-live), publish-pypi.yml (release gate).
+
+name: Reusable lint and test
+
+on:
+  workflow_call:
+    inputs:
+      python-version:
+        required: true
+        type: string
+      pip-audit:
+        description: Run pip-audit (warn-only; does not fail the job)
+        required: false
+        type: boolean
+        default: false
+      skillware:
+        description: Install [skillware] and run registry integration tests only
+        required: false
+        type: boolean
+        default: false
+
+permissions:
+  contents: read
+
+jobs:
+  run:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: actions/setup-python@v5
+        with:
+          python-version: ${{ inputs.python-version }}
+
+      - name: Install dependencies
+        run: |
+          python -m pip install --upgrade pip
+          if [ "${{ inputs.skillware }}" = "true" ]; then
+            pip install -e ".[dev,skillware]"
+          else
+            pip install -e ".[dev]"
+          fi
+
+      - name: Dependency audit (warn-only)
+        if: inputs.pip-audit == true
+        continue-on-error: true
+        run: |
+          pip install pip-audit
+          pip-audit
+
+      - name: black
+        if: inputs.skillware != true
+        run: black --check aura tests integrations examples
+
+      - name: flake8
+        if: inputs.skillware != true
+        run: flake8 aura tests integrations examples
+
+      - name: pytest (gate suite)
+        if: inputs.skillware != true
+        run: pytest --cov=aura --cov-report=term-missing --ignore=tests/integration
+
+      - name: pytest skillware
+        if: inputs.skillware == true
+        run: pytest tests/test_skillware_integration.py -v
diff --git a/CHANGELOG.md b/CHANGELOG.md
index f41c3fe..cb49cf6 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -38,6 +38,8 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ### Changed
 
+- **Reusable CI workflow** — `.github/workflows/reusable-test.yml` shared by PR CI and PyPI publish; fixes publish drift (flake8 scope, `--ignore=tests/integration`) ([#17](https://github.com/ARPAHLS/aura/issues/17)).
+
 - **Docs sync (post–#12)** — INDEX, ROADMAP, integration guides, follow-ups backlog, OTel/observer sections aligned with PR #43 closure ([#41](https://github.com/ARPAHLS/aura/issues/41), [#22](https://github.com/ARPAHLS/aura/issues/22)).
 
 - **Example 06** — compress step skips when scan `is_safe` is false (sequencer `when`).
diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index d449201..c19613f 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -132,7 +132,7 @@ Follow the [Code of Conduct](CODE_OF_CONDUCT.md). We welcome autonomous logical
 
 - Shared fixtures: **`tests/conftest.py`** (`aura_home`, `run_aura` for CLI subprocess tests).
 - Full suite is **64+ tests** across `test_core.py`, `test_core_gaps.py`, `test_v02.py`, `test_v03.py`, `test_cli.py`, `test_examples_smoke.py` — see [TESTING.md](docs/TESTING.md).
-- CI runs on PRs via [`.github/workflows/ci.yml`](.github/workflows/ci.yml) (Python **3.10–3.13** matrix; gate job **`lint-test`**: pytest with coverage report, black, flake8). Each matrix cell also runs `pip-audit` as a warn-only dependency check; its findings or audit errors do not fail the gate or block a PR. See [TESTING.md](docs/TESTING.md) for the exact commands.
+- CI runs on PRs via [`.github/workflows/ci.yml`](.github/workflows/ci.yml) (Python **3.10–3.13** matrix; gate job **`lint-test`**: pytest with coverage report, black, flake8). Steps are defined once in [`.github/workflows/reusable-test.yml`](.github/workflows/reusable-test.yml). Each matrix cell also runs `pip-audit` as a warn-only dependency check; its findings or audit errors do not fail the gate or block a PR. See [TESTING.md](docs/TESTING.md) for the exact commands.
 - Wait for green checks before requesting review.
 
 ### CHANGELOG
@@ -161,7 +161,7 @@ Pure internal refactors with no user-visible effect may omit CHANGELOG; ask on t
 | New core example | `examples/README.md`, optional link from `docs/getting-started.md` |
 | Architecture terminology | `docs/architecture.md`, `README.md` diagrams (keep in sync) |
 | Release / PyPI behavior | `docs/PUBLISHING.md`, `.github/workflows/publish-pypi.yml`, CHANGELOG |
-| PR CI workflow | `.github/workflows/ci.yml`, `docs/TESTING.md`, `CONTRIBUTING.md`; keep publish test job in sync |
+| PR CI workflow | `.github/workflows/ci.yml`, `.github/workflows/reusable-test.yml`, `docs/TESTING.md`, `CONTRIBUTING.md` |
 | Issue template fields | `.github/labels.json` if new label needed; run label sync |
 | Version (maintainer only) | `pyproject.toml`, `aura/__init__.py`, `CITATION.cff`, CHANGELOG release section, Zenodo if archived |
 
diff --git a/docs/PUBLISHING.md b/docs/PUBLISHING.md
index 4f653dd..fb560c6 100644
--- a/docs/PUBLISHING.md
+++ b/docs/PUBLISHING.md
@@ -7,7 +7,7 @@ Releases are published automatically by [`.github/workflows/publish-pypi.yml`](.
 
 Pushing a `v*` tag alone does **not** publish; create and publish the GitHub Release from that tag.
 
-The workflow runs tests (Python 3.12), builds sdist/wheel, then uploads to PyPI. **Pull requests** are gated separately by [`.github/workflows/ci.yml`](.github/workflows/ci.yml) (Python 3.10–3.13 matrix; `lint-test` on every PR to `main`).
+The workflow calls **`reusable-test.yml`** (Python 3.12), builds sdist/wheel, then uploads to PyPI. **Pull requests** are gated separately by [`.github/workflows/ci.yml`](.github/workflows/ci.yml) (Python 3.10–3.13 matrix; `lint-test` on every PR to `main`).
 
 ## One-time PyPI setup
 
diff --git a/docs/TESTING.md b/docs/TESTING.md
index dc3de29..3059829 100644
--- a/docs/TESTING.md
+++ b/docs/TESTING.md
@@ -26,7 +26,15 @@ CI expectation: **pytest**, **black**, and **flake8** all pass on `aura/` and `t
 
 ## Continuous integration
 
-GitHub Actions workflow **[`.github/workflows/ci.yml`](../.github/workflows/ci.yml)** runs on:
+GitHub Actions:
+
+| Workflow | Role |
+|---|---|
+| **[`ci.yml`](../.github/workflows/ci.yml)** | PR + push to `main` — Python matrix, Skillware job, gate `lint-test` |
+| **[`reusable-test.yml`](../.github/workflows/reusable-test.yml)** | **Single source** for install / black / flake8 / pytest (issue [#17](https://github.com/ARPAHLS/aura/issues/17)) |
+| **[`publish-pypi.yml`](../.github/workflows/publish-pypi.yml)** | Release gate — calls `reusable-test.yml` on Python 3.12 before upload |
+
+**[`ci.yml`](../.github/workflows/ci.yml)** runs on:
 
 - every **pull request** targeting `main`
 - every **push** to `main` (post-merge sanity)
@@ -37,15 +45,15 @@ Python matrix on **ubuntu-latest** (`fail-fast: true` — one version failure ca
 python-version: ["3.10", "3.11", "3.12", "3.13"]
 ```
 
-Each cell runs the same steps:
+Each matrix cell invokes **`reusable-test.yml`** with the same steps:
 
 ```bash
 pip install -e ".[dev]"
 pip install pip-audit
 pip-audit                 # warn-only; does not block the CI gate
-black --check aura tests
-flake8 aura tests
-pytest --cov=aura --cov-report=term-missing
+black --check aura tests integrations examples
+flake8 aura tests integrations examples
+pytest --cov=aura --cov-report=term-missing --ignore=tests/integration
 ```
 
 The **Dependency audit (warn-only)** step runs `pip-audit` with
@@ -59,7 +67,9 @@ The workflow also emits a gate job named **`lint-test`** that succeeds only when
 
 **Fork PRs:** the workflow uses `permissions: contents: read` only — no repository secrets, no PyPI OIDC, no deploy environment.
 
-**Publish workflow:** [`.github/workflows/publish-pypi.yml`](../.github/workflows/publish-pypi.yml) runs the same install/lint/test commands on a single Python 3.12 before release upload. The advisory `pip-audit` step belongs to PR CI and is not a release-blocking check. Full 3.10–3.13 coverage is the PR CI matrix; keep the *commands* in sync until a reusable workflow lands (separate CI follow-up issue).
+**Publish workflow:** [`.github/workflows/publish-pypi.yml`](../.github/workflows/publish-pypi.yml) calls **`reusable-test.yml`** on Python 3.12 before release upload (no `pip-audit`; same black/flake8/pytest scope as PR CI). Full 3.10–3.13 coverage is the PR CI matrix.
+
+**Skillware job:** **`skillware-live`** in `ci.yml` calls **`reusable-test.yml`** with `skillware: true` — `pip install -e ".[dev,skillware]"` and `pytest tests/test_skillware_integration.py`.
 
 **Maintainers:** after the first green `lint-test` run on `main`, enable **branch protection** → required status check **`lint-test`**.
 
@@ -107,9 +117,9 @@ Integration tests **fail** (not skip) if Ollama or Skillware is missing — that
 
 ## Pre-PR checklist
 
-1. `pytest`
-2. `black aura tests` (no diff)
-3. `flake8 aura tests`
+1. `pytest --ignore=tests/integration`
+2. `black aura tests integrations examples` (no diff)
+3. `flake8 aura tests integrations examples`
 4. CHANGELOG entry under `[Unreleased]` or release section
 5. Docs updated if behavior or CLI changed
 
diff --git a/docs/contributing/ai_native_workflow.md b/docs/contributing/ai_native_workflow.md
index 6eeb921..1300e00 100644
--- a/docs/contributing/ai_native_workflow.md
+++ b/docs/contributing/ai_native_workflow.md
@@ -45,7 +45,7 @@ Written for **autonomous and semi-autonomous agents** working on AURA Harness. H
 - **Session export:** `.jsonl`, `.summary.json` (with `audit_report`), `.otel.jsonl`
 - **CLI:** `aura agent create/set`, `config show`, `paths`, `run`, `logs`, `export`, `export-otel`, `compare`
 - **SDK helpers:** `AuditSpine.from_jsonl()` for disk verify; `compare_sessions()` includes `agent_ref` and `hash_chain_valid` diffs
-- **CI:** Python 3.10–3.13 matrix on every PR; gate job `lint-test` ([`ci.yml`](../../.github/workflows/ci.yml))
+- **CI:** Python 3.10–3.13 matrix on every PR; gate job `lint-test` ([`ci.yml`](../../.github/workflows/ci.yml) → [`reusable-test.yml`](../../.github/workflows/reusable-test.yml))
 
 ---