diff --git a/.github/ISSUE_TEMPLATE/bug_report.md b/.github/ISSUE_TEMPLATE/bug_report.md
new file mode 100644
index 0000000..2091a29
--- /dev/null
+++ b/.github/ISSUE_TEMPLATE/bug_report.md
@@ -0,0 +1,33 @@
+---
+name: Bug report
+about: Report something that does not work as expected
+title: "bug: "
+labels: bug
+---
+
+<!-- Please search existing issues first. Do NOT include secrets, tokens, or
+     private workspace contents in logs you paste. -->
+
+## What happened
+
+<!-- A clear description of the bug and what you expected instead. -->
+
+## Steps to reproduce
+
+1.
+2.
+3.
+
+## Environment
+
+- MAESTRO version / commit:
+- Install method: <!-- Docker Compose / from source -->
+- OS & Node.js version:
+- LLM endpoint: <!-- Ollama / vLLM / gateway; model name -->
+
+## Logs
+
+<!-- Relevant output from `scripts/server.sh logs`, with secrets redacted. -->
+
+```
+```
diff --git a/.github/ISSUE_TEMPLATE/config.yml b/.github/ISSUE_TEMPLATE/config.yml
new file mode 100644
index 0000000..db18f92
--- /dev/null
+++ b/.github/ISSUE_TEMPLATE/config.yml
@@ -0,0 +1,8 @@
+blank_issues_enabled: false
+contact_links:
+  - name: Security vulnerability
+    url: https://github.com/your-org/maestro/blob/main/SECURITY.md
+    about: Do not open a public issue for a vulnerability. Follow the security policy instead.
+  - name: Documentation
+    url: https://github.com/your-org/maestro/tree/main/docs
+    about: Setup, configuration, and architecture guides.
diff --git a/.github/ISSUE_TEMPLATE/feature_request.md b/.github/ISSUE_TEMPLATE/feature_request.md
new file mode 100644
index 0000000..54bb224
--- /dev/null
+++ b/.github/ISSUE_TEMPLATE/feature_request.md
@@ -0,0 +1,22 @@
+---
+name: Feature request
+about: Suggest an enhancement or new capability
+title: "feat: "
+labels: enhancement
+---
+
+## Problem
+
+<!-- What are you trying to do, and what gets in the way today? -->
+
+## Proposed solution
+
+<!-- What you would like to happen. -->
+
+## Alternatives considered
+
+<!-- Other approaches you thought about, if any. -->
+
+## Additional context
+
+<!-- Mockups, links, or related issues. -->
diff --git a/.github/PULL_REQUEST_TEMPLATE.md b/.github/PULL_REQUEST_TEMPLATE.md
new file mode 100644
index 0000000..313465d
--- /dev/null
+++ b/.github/PULL_REQUEST_TEMPLATE.md
@@ -0,0 +1,25 @@
+<!-- Thanks for contributing to MAESTRO! Keep PRs focused; see CONTRIBUTING.md. -->
+
+## Summary
+
+<!-- What does this change do, and why? -->
+
+## Related issues
+
+<!-- e.g. Closes #123 -->
+
+## How verified
+
+<!-- Commands run and their result. -->
+
+- [ ] `npx tsc --noEmit` is clean
+- [ ] Relevant tests pass (`npm test` or a focused `npx vitest run <file>`)
+
+## Checklist
+
+- [ ] Change is focused and scoped to one concern
+- [ ] Tests added/adjusted for behavior that changed
+- [ ] New config options reflected in `config.yaml.example` **and** `docs/configuration.md`
+- [ ] New tools registered in `tools/index.ts` + listed in the relevant Piece + documented in `docs/tools/`
+- [ ] DB schema changes have an idempotent migration in `src/db/migrate.ts`
+- [ ] Docs updated when behavior or setup changed
diff --git a/CODE_OF_CONDUCT.md b/CODE_OF_CONDUCT.md
new file mode 100644
index 0000000..a929ae1
--- /dev/null
+++ b/CODE_OF_CONDUCT.md
@@ -0,0 +1,21 @@
+# Code of Conduct
+
+This project adopts the [Contributor Covenant](https://www.contributor-covenant.org/version/2/1/code_of_conduct/),
+version 2.1, as its Code of Conduct.
+
+In short: we want participation in this project to be a respectful,
+harassment-free experience for everyone. Be considerate and constructive in
+issues, pull requests, and all other project spaces.
+
+## Scope
+
+This Code of Conduct applies within all project spaces and when an individual
+is representing the project in public spaces.
+
+## Reporting
+
+If you experience or witness unacceptable behavior, report it privately to the
+maintainers using the repository host's private contact feature, or by
+contacting the repository owner directly. Reports will be reviewed and handled
+discreetly. The full text of the standards, enforcement guidelines, and
+maintainer responsibilities is available at the Contributor Covenant link above.
diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index 54e007b..405a19b 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -3,6 +3,11 @@
 Thanks for your interest in contributing! This guide covers how to build, run,
 test, and submit changes.
 
+## Code of Conduct
+
+This project is governed by our [Code of Conduct](CODE_OF_CONDUCT.md). By
+participating, you are expected to uphold it.
+
 ## Prerequisites
 
 - **Node.js 22+**
diff --git a/README.ja.md b/README.ja.md
index 6a236dc..f16e5c0 100644
--- a/README.ja.md
+++ b/README.ja.md
@@ -57,6 +57,7 @@ scripts/server.sh start                 # http://localhost:9876
 - **[docs/tools/](docs/tools/)** — 各ツールの詳細
 - **[docs/operations/bash-sandbox-provisioning.md](docs/operations/bash-sandbox-provisioning.md)** — 本番でのサンドボックス有効化手順
 - **[AGENTS.md](AGENTS.md)** / **[CONTRIBUTING.md](CONTRIBUTING.md)** — コントリビュータ向け
+- **[CODE_OF_CONDUCT.md](CODE_OF_CONDUCT.md)** — コミュニティ行動規範
 - **[SECURITY.md](SECURITY.md)** — セキュリティ方針・脆弱性報告
 
 ## セキュリティ
diff --git a/README.md b/README.md
index eb7a297..674debe 100644
--- a/README.md
+++ b/README.md
@@ -57,6 +57,7 @@ For detailed instructions, see **[docs/getting-started.md](docs/getting-started.
 - **[docs/tools/](docs/tools/)** — details of each tool
 - **[docs/operations/bash-sandbox-provisioning.md](docs/operations/bash-sandbox-provisioning.md)** — how to enable the sandbox in production
 - **[AGENTS.md](AGENTS.md)** / **[CONTRIBUTING.md](CONTRIBUTING.md)** — for contributors
+- **[CODE_OF_CONDUCT.md](CODE_OF_CONDUCT.md)** — community standards
 - **[SECURITY.md](SECURITY.md)** — security policy and vulnerability reporting
 
 ## Security