diff --git a/.changeset/open-loop-software-development-preset.md b/.changeset/open-loop-software-development-preset.md
new file mode 100644
index 0000000..cbbf1d9
--- /dev/null
+++ b/.changeset/open-loop-software-development-preset.md
@@ -0,0 +1,12 @@
+---
+'@gemstack/ai-autopilot': minor
+---
+
+Ship the "Software Development" domain preset (#243).
+
+The first built-in Open Loop preset, authored as a directory of `.md` files:
+two loops (major-change -> code-review + test-coverage + security-review; bug-fix
+-> root-cause + regression-test), five stack-agnostic prompt bodies, and one skill
+pointer. Non-web and user-picked (no dependency detection). Load it with
+`softwareDevelopmentPreset()`; `builtinPresetsDir()` points at the shipped
+`presets/` directory. Proves the bundle unit end to end.
diff --git a/packages/ai-autopilot/package.json b/packages/ai-autopilot/package.json
index cbf516f..de11adc 100644
--- a/packages/ai-autopilot/package.json
+++ b/packages/ai-autopilot/package.json
@@ -29,7 +29,8 @@
   },
   "files": [
     "dist",
-    "prompts"
+    "prompts",
+    "presets"
   ],
   "main": "./dist/index.js",
   "types": "./dist/index.d.ts",
diff --git a/packages/ai-autopilot/presets/software-development/loops/bug-fix.md b/packages/ai-autopilot/presets/software-development/loops/bug-fix.md
new file mode 100644
index 0000000..f6aab6a
--- /dev/null
+++ b/packages/ai-autopilot/presets/software-development/loops/bug-fix.md
@@ -0,0 +1,10 @@
+---
+name: bug-fix-loop
+description: What fires after a bug fix.
+metadata:
+  on: bug-fix
+  run: [root-cause, regression-test]
+---
+
+When the agent fixes a bug, confirm the root cause is understood and addressed
+(not just the symptom), then lock it in with a regression test.
diff --git a/packages/ai-autopilot/presets/software-development/loops/major-change.md b/packages/ai-autopilot/presets/software-development/loops/major-change.md
new file mode 100644
index 0000000..a55afcb
--- /dev/null
+++ b/packages/ai-autopilot/presets/software-development/loops/major-change.md
@@ -0,0 +1,10 @@
+---
+name: major-change-loop
+description: What fires after a substantial code change.
+metadata:
+  on: major-change
+  run: [code-review, test-coverage, security-review]
+---
+
+When the agent lands a substantial change, review it, check it is covered by
+tests, then look for security regressions — in that order.
diff --git a/packages/ai-autopilot/presets/software-development/preset.md b/packages/ai-autopilot/presets/software-development/preset.md
new file mode 100644
index 0000000..d38d131
--- /dev/null
+++ b/packages/ai-autopilot/presets/software-development/preset.md
@@ -0,0 +1,10 @@
+---
+name: software-development
+description: A stack-agnostic engineering loop — review, tests, and security on every substantial change, root-cause and regression coverage on every fix.
+metadata:
+  title: Software Development
+---
+
+The general software engineering domain. Not tied to a web framework: it runs the
+same review / test / security discipline over any codebase. Pick it when you want
+solid engineering hygiene without a stack-specific preset.
diff --git a/packages/ai-autopilot/presets/software-development/prompts/code-review.md b/packages/ai-autopilot/presets/software-development/prompts/code-review.md
new file mode 100644
index 0000000..52238e7
--- /dev/null
+++ b/packages/ai-autopilot/presets/software-development/prompts/code-review.md
@@ -0,0 +1,21 @@
+---
+name: code-review
+description: Review a change for correctness, clarity, and design.
+appliesTo: ["**/*"]
+metadata:
+  title: Code review
+  loopId: code-review
+  passes: 1
+  event: major-change
+---
+
+You are reviewing a substantial change. Read the diff and the code around it, then
+report the issues that actually matter — correctness first, then clarity and design.
+
+Focus on:
+- **Correctness** — logic errors, unhandled cases, off-by-one, race conditions, wrong assumptions.
+- **Clarity** — names, control flow, and comments a maintainer will thank or curse you for.
+- **Design** — does the change fit the surrounding code, or does it fork a second way to do one thing?
+
+For each finding give one line on what is wrong and one line on the fix. Skip nits
+the linter already catches. If the change is sound, say so plainly and stop.
diff --git a/packages/ai-autopilot/presets/software-development/prompts/regression-test.md b/packages/ai-autopilot/presets/software-development/prompts/regression-test.md
new file mode 100644
index 0000000..6e46838
--- /dev/null
+++ b/packages/ai-autopilot/presets/software-development/prompts/regression-test.md
@@ -0,0 +1,21 @@
+---
+name: regression-test
+description: Ensure a fix is locked in by a test that fails without it.
+appliesTo: ["**/*"]
+metadata:
+  title: Regression test
+  loopId: regression-test
+  passes: 1
+  event: bug-fix
+---
+
+You are making sure a bug fix is locked in by a regression test — one that fails on
+the old code and passes on the new.
+
+Check:
+- Is there a test that reproduces the original bug and would fail without this fix?
+- Does it assert the corrected behavior, not just the absence of the crash?
+- Is it placed and named so a future reader knows which bug it guards?
+
+If the regression test is missing or weak, describe the exact case it should cover.
+If it is already present and meaningful, confirm it and stop.
diff --git a/packages/ai-autopilot/presets/software-development/prompts/root-cause.md b/packages/ai-autopilot/presets/software-development/prompts/root-cause.md
new file mode 100644
index 0000000..f22638a
--- /dev/null
+++ b/packages/ai-autopilot/presets/software-development/prompts/root-cause.md
@@ -0,0 +1,22 @@
+---
+name: root-cause
+description: Confirm a fix addresses the root cause, not the symptom.
+appliesTo: ["**/*"]
+metadata:
+  title: Root cause
+  loopId: root-cause
+  passes: 1
+  event: bug-fix
+---
+
+You are checking that a bug fix addresses the **root cause**, not just the symptom
+that was reported.
+
+Work backwards from the fix:
+- What was the actual defect, and why did it produce the observed symptom?
+- Does the fix remove the defect, or does it mask it (a guard, a retry, a catch that swallows)?
+- Could the same root cause surface elsewhere in the codebase through a different path?
+
+State the root cause in one sentence. If the fix only treats the symptom, say what
+the real fix is. If it correctly removes the cause, confirm it and note any sibling
+sites worth the same treatment.
diff --git a/packages/ai-autopilot/presets/software-development/prompts/security-review.md b/packages/ai-autopilot/presets/software-development/prompts/security-review.md
new file mode 100644
index 0000000..68ba3eb
--- /dev/null
+++ b/packages/ai-autopilot/presets/software-development/prompts/security-review.md
@@ -0,0 +1,22 @@
+---
+name: security-review
+description: Look for security regressions introduced by the change.
+appliesTo: ["**/*"]
+metadata:
+  title: Security review
+  loopId: security-review
+  passes: 1
+  event: major-change
+---
+
+You are checking a change for security regressions. Scope the review to what the
+change touches; do not audit the whole codebase.
+
+Look for:
+- Untrusted input reaching a sink (injection, path traversal, deserialization).
+- Authn/authz gaps — a route, action, or resource that skips a check the neighbors make.
+- Secrets, tokens, or PII in code, logs, or error messages.
+- Unsafe defaults and dependencies added with known advisories.
+
+Report each concrete risk with the file, why it is exploitable, and the fix. If the
+change introduces no new exposure, say so and stop.
diff --git a/packages/ai-autopilot/presets/software-development/prompts/test-coverage.md b/packages/ai-autopilot/presets/software-development/prompts/test-coverage.md
new file mode 100644
index 0000000..225c1de
--- /dev/null
+++ b/packages/ai-autopilot/presets/software-development/prompts/test-coverage.md
@@ -0,0 +1,21 @@
+---
+name: test-coverage
+description: Check the change is covered by meaningful tests.
+appliesTo: ["**/*"]
+metadata:
+  title: Test coverage
+  loopId: test-coverage
+  passes: 1
+  event: major-change
+---
+
+You are checking that a substantial change is covered by tests that would actually
+catch a regression — not coverage for its own sake.
+
+Ask:
+- Does every new branch and edge case have a test that fails if the behavior breaks?
+- Are the tests asserting behavior, or just that the code ran without throwing?
+- Is anything important only exercised by a happy-path test?
+
+Name the specific untested paths and, for each, the one test worth adding. If the
+change is a pure refactor with existing coverage, say so and stop.
diff --git a/packages/ai-autopilot/presets/software-development/skills/eng-practices.md b/packages/ai-autopilot/presets/software-development/skills/eng-practices.md
new file mode 100644
index 0000000..52e7b9a
--- /dev/null
+++ b/packages/ai-autopilot/presets/software-development/skills/eng-practices.md
@@ -0,0 +1,11 @@
+---
+name: eng-practices
+description: Google's engineering practices — code review and change-authoring guidelines.
+metadata:
+  title: Engineering Practices
+  url: https://google.github.io/eng-practices/
+---
+
+A stack-agnostic reference for what a good change and a good review look like:
+the reviewer standard, what to look for, and how to write a change that is easy to
+review. Consult it when framing review and authoring work.
diff --git a/packages/ai-autopilot/src/index.ts b/packages/ai-autopilot/src/index.ts
index eafde8d..c44948f 100644
--- a/packages/ai-autopilot/src/index.ts
+++ b/packages/ai-autopilot/src/index.ts
@@ -103,6 +103,7 @@
  * - {@link defineDomainPreset} / {@link loadDomainPreset} — author, or load from a directory
  * - {@link composeDomainPresets} — merge presets into one (later wins on prompt/skill id)
  * - {@link selectPreset} — pick the user's chosen domain by name
+ * - {@link softwareDevelopmentPreset} — the shipped, stack-agnostic built-in
  */
 export { Supervisor } from './supervisor.js'
 export { agentPlanner, type AgentPlannerOptions } from './planner.js'
@@ -336,6 +337,8 @@ export {
   loadDomainPreset,
   loadLoopsFrom,
   loadSkillsFrom,
+  builtinPresetsDir,
+  softwareDevelopmentPreset,
   type DomainPreset,
   type DomainPresetSpec,
   type DomainPresetMeta,
diff --git a/packages/ai-autopilot/src/preset/index.ts b/packages/ai-autopilot/src/preset/index.ts
index e07aa1f..e597810 100644
--- a/packages/ai-autopilot/src/preset/index.ts
+++ b/packages/ai-autopilot/src/preset/index.ts
@@ -9,5 +9,11 @@
  */
 export { defineDomainPreset, DomainPresetError } from './define.js'
 export { composeDomainPresets, selectPreset } from './compose.js'
-export { loadDomainPreset, loadLoopsFrom, loadSkillsFrom } from './load.js'
+export {
+  loadDomainPreset,
+  loadLoopsFrom,
+  loadSkillsFrom,
+  builtinPresetsDir,
+  softwareDevelopmentPreset,
+} from './load.js'
 export type { DomainPreset, DomainPresetSpec, DomainPresetMeta } from './types.js'
diff --git a/packages/ai-autopilot/src/preset/load.ts b/packages/ai-autopilot/src/preset/load.ts
index 3e06ae7..a59076b 100644
--- a/packages/ai-autopilot/src/preset/load.ts
+++ b/packages/ai-autopilot/src/preset/load.ts
@@ -1,4 +1,5 @@
 import { readFile, readdir } from 'node:fs/promises'
+import { fileURLToPath } from 'node:url'
 import { join } from 'node:path'
 import { parseSkillManifest } from '@gemstack/ai-skills'
 import { defineLoop } from '../loop/define.js'
@@ -51,6 +52,17 @@ export async function loadDomainPreset(dir: string): Promise<DomainPreset> {
   })
 }
 
+/** Absolute path to the package's shipped `presets/` directory. */
+export function builtinPresetsDir(): string {
+  // From dist/preset/load.js (and dist-test/…), the package root is two up.
+  return fileURLToPath(new URL('../../presets/', import.meta.url))
+}
+
+/** The shipped, stack-agnostic "Software Development" domain preset (#243). */
+export function softwareDevelopmentPreset(): Promise<DomainPreset> {
+  return loadDomainPreset(join(builtinPresetsDir(), 'software-development'))
+}
+
 /** Load every `*.md` loop file in a directory (a missing directory yields `[]`). */
 export async function loadLoopsFrom(dir: string): Promise<Loop[]> {
   const files = await mdFiles(dir)
diff --git a/packages/ai-autopilot/src/preset/software-development.test.ts b/packages/ai-autopilot/src/preset/software-development.test.ts
new file mode 100644
index 0000000..11b8b6c
--- /dev/null
+++ b/packages/ai-autopilot/src/preset/software-development.test.ts
@@ -0,0 +1,34 @@
+import { describe, it } from 'node:test'
+import assert from 'node:assert/strict'
+import { softwareDevelopmentPreset } from './load.js'
+
+describe('softwareDevelopmentPreset (shipped built-in)', () => {
+  it('loads the {loops, prompts, skills} bundle from the shipped directory', async () => {
+    const preset = await softwareDevelopmentPreset()
+    assert.equal(preset.name, 'software-development')
+    assert.equal(preset.title, 'Software Development')
+    assert.ok(preset.description.length > 0)
+
+    assert.equal(preset.loops.length, 2)
+    assert.ok(preset.prompts.length >= 5)
+    assert.equal(preset.skills.length, 1)
+    assert.equal(preset.skills[0]!.url, 'https://google.github.io/eng-practices/')
+  })
+
+  it('every id a loop dispatches resolves to a shipped prompt body', async () => {
+    const preset = await softwareDevelopmentPreset()
+    const ids = new Set(preset.prompts.map(p => p.id))
+    for (const loop of preset.loops) {
+      for (const id of loop.run) {
+        assert.ok(ids.has(id), `loop prompt "${id}" has a shipped body`)
+        assert.ok(preset.prompts.find(p => p.id === id)!.instructions.length > 0, `"${id}" body is non-empty`)
+      }
+    }
+  })
+
+  it('targets non-web events (major-change, bug-fix)', async () => {
+    const preset = await softwareDevelopmentPreset()
+    const kinds = preset.loops.flatMap(l => [...l.on]).sort()
+    assert.deepEqual(kinds, ['bug-fix', 'major-change'])
+  })
+})