docs: add AGENTS.md for AI agent guidance (#837)

* feat: add AGENNTS.md

Signed-off-by: Andy Lee <andy.lee@suse.com>

* refactor: update based on copilot feedback

Signed-off-by: Andy Lee <andy.lee@suse.com>

* refactor: update AGENTS.md

Signed-off-by: Andy Lee <andy.lee@suse.com>

* refactor: update based on AI suggestion

Signed-off-by: Andy Lee <andy.lee@suse.com>

* refactor: based on comments

Signed-off-by: Andy Lee <andy.lee@suse.com>

* refactor: some files

Signed-off-by: Andy Lee <andy.lee@suse.com>

* refactor: boundaries.md

Signed-off-by: Andy Lee <andy.lee@suse.com>

---------

Signed-off-by: Andy Lee <andy.lee@suse.com>
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> This `./AGENTS.md` file is generated by running `yarn agents:generate`.
# Project Overview
The Harvester UI Extension is a Rancher extension that provides the user interface for Harvester within the Rancher Dashboard.
```
Note: This extension is available starting from Rancher 2.10.0. Ensure your Rancher version is 2.10.0 or later to access Harvester integration.
```
# Personas
## Software Developer
You are an expert Senior Software Engineer specializing in Vue.js and TypeScript. You have deep knowledge of Kubernetes and the Rancher ecosystem.
- **Focus**: Writing clean, maintainable, and performant code.
- **Priorities**: Adhering to the project's code style, ensuring type safety, and following best practices for component design.
# Agents
## Boundaries
- ✅ **Always:**
- Write to `.github`, `docs/`, `pkg/harvester`, `scripts/`.
- Make commits in a new branch (for a PR).
- Run `yarn lint:fix` before commits.
- Use conventional commit format:
```
<type>:
<description>
```
- Follow existing naming conventions (PascalCase for components, camelCase for functions).
- After changing a Vue, JS, or TS file, make sure it's automatically formatted with ESLint.
- After updating files in `docs/agents.md/`, run `yarn agents:generate` to update root `AGENTS.md`.
- ⚠️ **Ask first:**
- Adding dependencies
- Upgrading dependencies
- 🚫 **Never:**
- Commit or log secrets, `.env`, `kubeconfig` or any API keys.
- Edit `node_modules/`.
- Commit directly to `main` (use PRs).
- Skip git hooks with `--no-verify` flag.
## Tools
### Prerequisites
- **Node.js**: `>= 24.0.0` (see `.nvmrc` for the pinned version: `24`)
- **Package manager**: `yarn` (v1 classic)
### Common Commands
| Command | Description |
|---------|-------------|
| `yarn install --frozen-lockfile` | Install dependencies (CI-safe, no lockfile changes) |
| `RANCHER_ENV=harvester API=https://<harvester-ip> yarn dev` | Start development server at `https://127.0.0.1:8005` |
| `yarn build-pkg harvester` | Build the Harvester extension package |
| `yarn serve-pkgs` | Serve the locally built extension for testing |
| `yarn lint` | Run ESLint (zero warnings allowed) |
| `yarn lint:fix` | Run ESLint with auto-fix |
| `yarn clean` | Clean build artifacts |
| `yarn agents:generate` | Regenerate `AGENTS.md` from `docs/agents.md/` sources |
### Development
- **Start dev server**:
```bash
RANCHER_ENV=harvester API=https://your-harvester-ip yarn dev
```
- `API` should point to a running Harvester cluster (e.g., `https://x.x.x.x`).
- The dashboard will be available at `https://127.0.0.1:8005`.
### Building
- **Build extension package**:
```bash
yarn build-pkg harvester
```
- **Serve locally built extension** (for integration testing with a Rancher instance):
```bash
yarn serve-pkgs
```
### Linting
- **Check** (must pass with zero warnings):
```bash
yarn lint
```
- **Auto-fix**:
```bash
yarn lint:fix
```
- ESLint covers `.js`, `.ts`, and `.vue` files.
- Always run `yarn lint:fix` before committing.
### Commit Conventions
- Commits are validated by [commitlint](https://commitlint.js.org/) via a Husky `commit-msg` hook.
- Follow [Conventional Commits](https://www.conventionalcommits.org/) format (configured in `commitlint.config.js`).
### Agent Documentation
- Source files live in `docs/agents.md/` (agents, contributors, personas subdirectories).
- After editing any source file, regenerate the root `AGENTS.md`:
```bash
yarn agents:generate
```
# Contributors Guide
## Getting Started
Please see the [Harvester UI Extension README](https://github.com/harvester/harvester-ui-extension).
To get started, follow the `Development Setup` section.
## Project Information
- **Tech Stack:**
- `Vue.js`: Framework
- `Linting`: ESLint
- `CSS`: SCSS should be used
- `TypeScript`: Primary language for logic.
- **Code Style and Standards:**
- `Language`: TypeScript is preferred for new code.
- `Vue.js`:
- Composition API components are preferred over Options API.
- Large pages with lots of code and styles should be avoided by breaking the page up into smaller Vue components.
- Place source tag above template above style.
- style tag should contain `lang='scss' scoped`.
- `Linting`: Follow the ESLint configuration in the root.
- **File Structure:**
- `.github/`: CI/CD workflows and Renovate config.
- `docs/`: Documentation source for `AGENTS.md` generation.
- `scripts/`: Bash scripts for build, CI and doc generation.
- `pkg/harvester/`: Main extension source. Files are named after K8s resource types (e.g., `kubevirt.io.virtualmachine`, `harvesterhci.io.volume`).
- `index.ts`: Plugin entry point — registers the product and auto-imports models/detail/edit views.
- `types.ts`: `HCI` constant mapping 60+ K8s resource types to string identifiers.
- `components/`: Reusable Vue components (VNC/serial console, settings panels, upgrade banners, filters).
- `config/`: Constants — settings keys, table column definitions, feature flags, type mappings, doc links.
- `detail/`: Read-only detail views per resource type. Complex resources use subdirectories with tabs.
- `dialog/`: Modal dialogs for operations (VM clone/migrate/restart, backup/restore, device passthrough, etc.).
- `edit/`: Create/edit forms. Complex resources (e.g., VM) split into subcomponents (CpuMemory, Network, Volume, CloudConfig, etc.).
- `formatters/`: Table cell formatters — state badges, usage bars, resource references.
- `l10n/`: Localization (`en-us.yaml`).
- `list/`: List (table) views per resource type, mirroring `detail/` and `edit/` naming.
- `mixins/`: Shared Vue mixins — VM helpers (`harvester-vm/`) and disk helpers (`harvester-disk.js`).
- `models/`: Model classes extending `SteveModel` with computed properties and actions. Base class: `harvester.js`.
- `pages/`: Route-level pages — dashboard, support, console, members, brand, alertmanager.
- `promptRemove/`: Custom delete-confirmation dialogs (VM, backup).
- `routing/`: Vue Router config — all product routes (CRUD, console, support, upgrade, etc.).
- `store/`: Vuex modules — `harvester-common.js` for shared state; `harvester-store/` for VM/resource creation actions with Steve integration.
- `styles/`: Global SCSS files.
- `utils/`: Helpers — VM volume templates, CPU/memory calc, cron parsing, regex validators, feature flags.
- `validators/`: Form validation functions per resource type, pushing i18n error messages.
## Harvester UI Extension Development Guide
1. Backward Compatibility
The Harvester UI Extension supports earlier cluster versions (e.g., UI Ext v1.8.0 works with clusters v1.7.0 and v1.6.0). It uses Feature Flags defined in pkg/config/feature-flags to ensure the UI matches the cluster's specific version.
2. Implementation Steps for New Features
To add a feature in a new release, follow these steps:
Register: Add a unique [Feature Name] to the corresponding release array in the configuration.
Check: Use the following getter to verify if the feature is enabled for the current version:
```
computed: {
newFeatureEnabled() {
return this.$store.getters['harvester-common/getFeatureEnabled']('[Feature Name]');
},
},
```
Render: Use the result of the check to conditionally render the UI components.
## E2E Tests (Cypress)
See https://github.com/harvester/harvester-ui-tests
## Node Dependencies
Dependencies are managed via `package.json` and `yarn`
- To install dependencies use `yarn install`. This will fail if dependencies and versions listed in `package.json` are out of step with the `yarn.lock` file
- To add a dependency use `yarn run add:no-lock ...` instead of `yarn add`
- To upgrade a dependency use `yarn run upgrade:no-lock ...` instead of `yarn upgrade`
Renovate automatically updates dependencies and opens upgrade PRs after 10:00 AM on Sundays (`Asia/Taipei`).
For the Renovate config, see `.github/renovate.json`.
## Milestone guidance
- All issues must first be resolved in the `main` branch
- If backports are needed they can be made via the backport bot
- pull requests
- comment `@Mergifyio backport <target branch>` e.g. `@Mergifyio backport release-harvester-v1.8`
- All backported pull requests must link to a backported issue
## Creating a branch
### To resolve an issue
- Checkout the branch matching the milestone of the issue `git checkout ${targetMilestoneBranch}`. Replace `${targetMilestoneBranch}` with the target milestone of the issue. For example
- `main` for the latest unreleased minor version
- `release-harvester-v.X` for release minor versions
- `release-harvester-v1.6`
- `release-harvester-v1.7`
- `release-harvester-v1.8`
- Ensure you have the latest of that branch `git pull --rebase`
- Checkout the branch to commit the changes to `git checkout issue-${issueNumber}`. Replace `${issueNumber}` with the issue number.
## Creating a commit
- This project uses commit-lint with [Conventional Commits](https://www.conventionalcommits.org/en/v1.0.0/) to ensure consistent and meaningful commit messages.
### Commit Message Format
All commit messages must follow the conventional commit format:
```
<type>[optional scope]: <description>
[optional body]
[optional footer(s)]
```
### Supported Types
- feat: New features
- fix: Bug fixes
- docs: Documentation changes
- style: Code style changes (formatting, missing semicolons, etc.)
- refactor: Code refactoring
- perf: Performance improvements
- test: Adding or updating tests
- build: Build system or external dependencies
- ci: CI/CD changes
- chore: Other changes that don't modify src or test files
- revert: Reverts a previous commit
- wip: Work in progress
- deps: Dependency updates
- security: Security fixes
## Creating a Pull Request
- Pull requests must come from forks
- Description should always have commit supported type prefix. E.g `fix: XXX`, `feat: OOO`
- A Pull Request will only be merged once
- ALL CI gates have passed
- At least one harvester/harvester-ui-extension code owners reviews and approves the PR

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# Agents.md
This folder contains files used to construct a single root `AGENTS.md`
We do this because
- The single commonality between almost all AI tools is that they look for a root `AGENTS.md`
- Having the information in a single place for all AI tools is better than duplicating and maintaining the information in multiple files for each AI tool
## Process
1. Add files to or update files in `./docs/agents.md/agents`, `./docs/agents.md/personas`, `./docs/agents.md/contributors`.
2. Each file must
- Start markdown headers at the `##` level
- End in a new line
- Order contents in AGENTS.md by giving an optional number prefix
3. Run `yarn agents:generate`.
- Take the contents of `./docs/agents.md/template_agents.md`
- Insert the contents of the agents, personas and contributors files
- Output to `./AGENTS.md`
4. Commit all changes, including root `./AGENTS.md` and any files that link to it
## Guidance
### Examples
When referencing code or configuration it's good to include an example
## Future Tasks
- Add real world examples when referencing code
- Create a GH workflow to monitor `agents.md` folder files in a PR, if changed run generate script and add new AGENTS.md to PR
- Discuss
- Three multi AI tool related questions
- Questions
- how AI specific patterns, like co-pilot instructions, can be expressed in a way to be adopted by or reduce duplication with the root agents.md
- how AI tool specific metadata code can be included
- multiple agents vs personas approach works
- Proposal
- Generic information applicable to all AI tools is added to the root `agents.md`
- Agent, instruction or other AI specific files or patterns can be used in files specific to that AI tool. They must not contain duplicate information to the root `agents.md`
- The root `agents.md` continues to be AI tool agnostic
- How can folder specific agents be used
- Proposal
- `agents.md` are added to folders as long as most LLMs can make use of them and they do not duplicate information in the root `agents.md`
## Test Prompts
To validate LLMs are picking up information consider running the following prompts.
### Information
Can they provide correct information?
- `what's this project about?`
- `can you tell me the process for fixing a github issue in this repo?`
- `what makes a good software developer?`
- `what should never be done in this project?`
- `what are the folders in this project for?`
- `what are the env vars i could use when running e2e tests?`
### Actions
Can they use the information in their actions?
Pending

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## Boundaries
- ✅ **Always:**
- Write to `.github`, `docs/`, `pkg/harvester`, `scripts/`.
- Make commits in a new branch (for a PR).
- Run `yarn lint:fix` before commits.
- Use conventional commit format:
```
<type>:
<description>
```
- Follow existing naming conventions (PascalCase for components, camelCase for functions).
- After changing a Vue, JS, or TS file, make sure it's automatically formatted with ESLint.
- After updating files in `docs/agents.md/`, run `yarn agents:generate` to update root `AGENTS.md`.
- ⚠️ **Ask first:**
- Adding dependencies
- Upgrading dependencies
- 🚫 **Never:**
- Commit or log secrets, `.env`, `kubeconfig` or any API keys.
- Edit `node_modules/`.
- Commit directly to `main` (use PRs).
- Skip git hooks with `--no-verify` flag.

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## Tools
### Prerequisites
- **Node.js**: `>= 24.0.0` (see `.nvmrc` for the pinned version: `24`)
- **Package manager**: `yarn` (v1 classic)
### Common Commands
| Command | Description |
|---------|-------------|
| `yarn install --frozen-lockfile` | Install dependencies (CI-safe, no lockfile changes) |
| `RANCHER_ENV=harvester API=https://<harvester-ip> yarn dev` | Start development server at `https://127.0.0.1:8005` |
| `yarn build-pkg harvester` | Build the Harvester extension package |
| `yarn serve-pkgs` | Serve the locally built extension for testing |
| `yarn lint` | Run ESLint (zero warnings allowed) |
| `yarn lint:fix` | Run ESLint with auto-fix |
| `yarn clean` | Clean build artifacts |
| `yarn agents:generate` | Regenerate `AGENTS.md` from `docs/agents.md/` sources |
### Development
- **Start dev server**:
```bash
RANCHER_ENV=harvester API=https://your-harvester-ip yarn dev
```
- `API` should point to a running Harvester cluster (e.g., `https://x.x.x.x`).
- The dashboard will be available at `https://127.0.0.1:8005`.
### Building
- **Build extension package**:
```bash
yarn build-pkg harvester
```
- **Serve locally built extension** (for integration testing with a Rancher instance):
```bash
yarn serve-pkgs
```
### Linting
- **Check** (must pass with zero warnings):
```bash
yarn lint
```
- **Auto-fix**:
```bash
yarn lint:fix
```
- ESLint covers `.js`, `.ts`, and `.vue` files.
- Always run `yarn lint:fix` before committing.
### Commit Conventions
- Commits are validated by [commitlint](https://commitlint.js.org/) via a Husky `commit-msg` hook.
- Follow [Conventional Commits](https://www.conventionalcommits.org/) format (configured in `commitlint.config.js`).
### Agent Documentation
- Source files live in `docs/agents.md/` (agents, contributors, personas subdirectories).
- After editing any source file, regenerate the root `AGENTS.md`:
```bash
yarn agents:generate
```

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## Getting Started
Please see the [Harvester UI Extension README](https://github.com/harvester/harvester-ui-extension).
To get started, follow the `Development Setup` section.
## Project Information
- **Tech Stack:**
- `Vue.js`: Framework
- `Linting`: ESLint
- `CSS`: SCSS should be used
- `TypeScript`: Primary language for logic.
- **Code Style and Standards:**
- `Language`: TypeScript is preferred for new code.
- `Vue.js`:
- Composition API components are preferred over Options API.
- Large pages with lots of code and styles should be avoided by breaking the page up into smaller Vue components.
- Place source tag above template above style.
- style tag should contain `lang='scss' scoped`.
- `Linting`: Follow the ESLint configuration in the root.
- **File Structure:**
- `.github/`: CI/CD workflows and Renovate config.
- `docs/`: Documentation source for `AGENTS.md` generation.
- `scripts/`: Bash scripts for build, CI and doc generation.
- `pkg/harvester/`: Main extension source. Files are named after K8s resource types (e.g., `kubevirt.io.virtualmachine`, `harvesterhci.io.volume`).
- `index.ts`: Plugin entry point — registers the product and auto-imports models/detail/edit views.
- `types.ts`: `HCI` constant mapping 60+ K8s resource types to string identifiers.
- `components/`: Reusable Vue components (VNC/serial console, settings panels, upgrade banners, filters).
- `config/`: Constants — settings keys, table column definitions, feature flags, type mappings, doc links.
- `detail/`: Read-only detail views per resource type. Complex resources use subdirectories with tabs.
- `dialog/`: Modal dialogs for operations (VM clone/migrate/restart, backup/restore, device passthrough, etc.).
- `edit/`: Create/edit forms. Complex resources (e.g., VM) split into subcomponents (CpuMemory, Network, Volume, CloudConfig, etc.).
- `formatters/`: Table cell formatters — state badges, usage bars, resource references.
- `l10n/`: Localization (`en-us.yaml`).
- `list/`: List (table) views per resource type, mirroring `detail/` and `edit/` naming.
- `mixins/`: Shared Vue mixins — VM helpers (`harvester-vm/`) and disk helpers (`harvester-disk.js`).
- `models/`: Model classes extending `SteveModel` with computed properties and actions. Base class: `harvester.js`.
- `pages/`: Route-level pages — dashboard, support, console, members, brand, alertmanager.
- `promptRemove/`: Custom delete-confirmation dialogs (VM, backup).
- `routing/`: Vue Router config — all product routes (CRUD, console, support, upgrade, etc.).
- `store/`: Vuex modules — `harvester-common.js` for shared state; `harvester-store/` for VM/resource creation actions with Steve integration.
- `styles/`: Global SCSS files.
- `utils/`: Helpers — VM volume templates, CPU/memory calc, cron parsing, regex validators, feature flags.
- `validators/`: Form validation functions per resource type, pushing i18n error messages.
## Harvester UI Extension Development Guide
1. Backward Compatibility
The Harvester UI Extension supports earlier cluster versions (e.g., UI Ext v1.8.0 works with clusters v1.7.0 and v1.6.0). It uses Feature Flags defined in pkg/config/feature-flags to ensure the UI matches the cluster's specific version.
2. Implementation Steps for New Features
To add a feature in a new release, follow these steps:
Register: Add a unique [Feature Name] to the corresponding release array in the configuration.
Check: Use the following getter to verify if the feature is enabled for the current version:
```
computed: {
newFeatureEnabled() {
return this.$store.getters['harvester-common/getFeatureEnabled']('[Feature Name]');
},
},
```
Render: Use the result of the check to conditionally render the UI components.

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## E2E Tests (Cypress)
See https://github.com/harvester/harvester-ui-tests

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## Node Dependencies
Dependencies are managed via `package.json` and `yarn`
- To install dependencies use `yarn install`. This will fail if dependencies and versions listed in `package.json` are out of step with the `yarn.lock` file
- To add a dependency use `yarn run add:no-lock ...` instead of `yarn add`
- To upgrade a dependency use `yarn run upgrade:no-lock ...` instead of `yarn upgrade`
Renovate automatically updates dependencies and opens upgrade PRs after 10:00 AM on Sundays (`Asia/Taipei`).
For the Renovate config, see `.github/renovate.json`.

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## Milestone guidance
- All issues must first be resolved in the `main` branch
- If backports are needed they can be made via the backport bot
- pull requests
- comment `@Mergifyio backport <target branch>` e.g. `@Mergifyio backport release-harvester-v1.8`
- All backported pull requests must link to a backported issue
## Creating a branch
### To resolve an issue
- Checkout the branch matching the milestone of the issue `git checkout ${targetMilestoneBranch}`. Replace `${targetMilestoneBranch}` with the target milestone of the issue. For example
- `main` for the latest unreleased minor version
- `release-harvester-v.X` for release minor versions
- `release-harvester-v1.6`
- `release-harvester-v1.7`
- `release-harvester-v1.8`
- Ensure you have the latest of that branch `git pull --rebase`
- Checkout the branch to commit the changes to `git checkout issue-${issueNumber}`. Replace `${issueNumber}` with the issue number.
## Creating a commit
- This project uses commit-lint with [Conventional Commits](https://www.conventionalcommits.org/en/v1.0.0/) to ensure consistent and meaningful commit messages.
### Commit Message Format
All commit messages must follow the conventional commit format:
```
<type>[optional scope]: <description>
[optional body]
[optional footer(s)]
```
### Supported Types
- feat: New features
- fix: Bug fixes
- docs: Documentation changes
- style: Code style changes (formatting, missing semicolons, etc.)
- refactor: Code refactoring
- perf: Performance improvements
- test: Adding or updating tests
- build: Build system or external dependencies
- ci: CI/CD changes
- chore: Other changes that don't modify src or test files
- revert: Reverts a previous commit
- wip: Work in progress
- deps: Dependency updates
- security: Security fixes
## Creating a Pull Request
- Pull requests must come from forks
- Description should always have commit supported type prefix. E.g `fix: XXX`, `feat: OOO`
- A Pull Request will only be merged once
- ALL CI gates have passed
- At least one harvester/harvester-ui-extension code owners reviews and approves the PR

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## Software Developer
You are an expert Senior Software Engineer specializing in Vue.js and TypeScript. You have deep knowledge of Kubernetes and the Rancher ecosystem.
- **Focus**: Writing clean, maintainable, and performant code.
- **Priorities**: Adhering to the project's code style, ensuring type safety, and following best practices for component design.

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> This `./AGENTS.md` file is generated by running `yarn agents:generate`.
# Project Overview
The Harvester UI Extension is a Rancher extension that provides the user interface for Harvester within the Rancher Dashboard.
```
Note: This extension is available starting from Rancher 2.10.0. Ensure your Rancher version is 2.10.0 or later to access Harvester integration.
```
# Personas
`<personas>`
# Agents
`<agents>`
# Contributors Guide
`<contributors>`

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@ -49,7 +49,8 @@
"publish-pkgs": "./node_modules/@rancher/shell/scripts/extension/publish",
"parse-tag-name": "./node_modules/@rancher/shell/scripts/extension/parse-tag-name",
"commitlint": "commitlint --edit",
"prepare": "husky"
"prepare": "husky",
"agents:generate": "./scripts/generate-agent-and-persona-mds.sh"
},
"devDependencies": {
"@commitlint/load": "^19.8.1",

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#!/bin/bash
set -e
# Get the directory of the script
SCRIPT_DIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd )"
# Project root is one level up from scripts/
PROJECT_ROOT="$(dirname "$SCRIPT_DIR")"
# Source files
TEMPLATE_FILE="${PROJECT_ROOT}/docs/agents.md/template_agents.md"
AGENTS_DIR="${PROJECT_ROOT}/docs/agents.md/agents"
CONTRIBUTORS_DIR="${PROJECT_ROOT}/docs/agents.md/contributors"
PERSONAS_DIR="${PROJECT_ROOT}/docs/agents.md/personas"
# Destination file
OUTPUT_FILE="${PROJECT_ROOT}/AGENTS.md"
insert_directory_contents() {
local dir="$1"
if [ -d "$dir" ]; then
for file in "$dir"/*; do
if [ -f "$file" ]; then
cat "$file"
echo ""
fi
done
fi
}
echo "Generating ${OUTPUT_FILE}..."
while IFS= read -r line || [ -n "$line" ]; do
if [[ "$line" == *"<agents>"* ]]; then
insert_directory_contents "${AGENTS_DIR}"
elif [[ "$line" == *"<contributors>"* ]]; then
insert_directory_contents "${CONTRIBUTORS_DIR}"
elif [[ "$line" == *"<personas>"* ]]; then
insert_directory_contents "${PERSONAS_DIR}"
else
echo "$line"
fi
done < "${TEMPLATE_FILE}" > "${OUTPUT_FILE}"
echo "Done."