# AGENTS.md — Build guide for Siter.io

## Project scope
Build a visual page editor using a limited set of responsive components and publish static output. Support comments on a reviewed revision, while keeping simultaneous editing outside the first release.

Catalogue verdict: kinda. The visible collaborative website builder loop is buildable, but a credible replacement needs more than the first screen. Siter.io earns its keep through editor, CMS, hosting, polish, so expect a weekend or multi-day build and a narrower personal scope.
Use the implementation prompt below to define the deliverable. Complete each phase's acceptance checks before extending the scope.

## Working agreement
- Inspect the repository and its existing instructions before choosing paths, dependencies or commands. Keep one coherent stack and explain changes to the proposed architecture.
- Plan a vertical slice that accepts a real input and produces the useful output described below. Persist only the state the prompt calls for; respect memory-only and upstream-managed workflows. Use fixtures only when they are clearly labelled.
- After scaffolding, document the actual install, development, check and build commands in README and keep them synchronized with the package or project manifest. Do not report commands as successful unless they ran.
- Work in small steps. At handoff, list implemented flows, checks actually performed, remaining blockers, and any credentials or provider setup the owner must supply.
- Do not publish, spend money, contact customers, delete source data or run irreversible migrations without the project owner's authorization.

## Prerequisites
- Node, a selected output folder, licensed content/assets and a user-owned deployment target. DNS, email delivery and any server-side forms require separate configuration.
- Implementation components: Eleventy, Markdown content and typed JSON section manifests for a static website. A local Node editor/build command with Sharp image processing; generated files publish to a user-owned host.
- Scope boundary: general-purpose visual editing; large template and component libraries

## Stack and architecture
- Eleventy, Markdown content and typed JSON section manifests for a static website.
- A local Node editor/build command with Sharp image processing; generated files publish to a user-owned host.
- Domain model: site pages, constrained layout trees, breakpoint tokens, component props and saved revisions

## Security and data integrity
- Escape content, sanitize Markdown, constrain asset paths and never embed API secrets in the static output. Private content requires a real authenticated server rather than a hidden URL.
- Correctness boundary: Absolute visual positioning cannot silently break narrow screens; publication always refers to one complete saved revision.
- Build into a new output directory from a saved content revision. Preview at narrow and wide widths and deploy the complete artifact atomically; retain the previous release.
- Export source Markdown/JSON and original assets alongside the generated site. A clean build from that archive must not depend on an editor database.

## Agent implementation rules
- Project rule — data model: site pages, constrained layout trees, breakpoint tokens, component props and saved revisions
- Project rule — preserve this invariant: Absolute visual positioning cannot silently break narrow screens; publication always refers to one complete saved revision.
- Project rule — acceptance evidence: A layout overflowing a small viewport is flagged before export; reverting a release restores its matching assets and content.

## Optional agent skills and references
- Optional external skill: [frontend-design](https://github.com/anthropics/skills/blob/main/skills/frontend-design/SKILL.md) — Create intentional web layouts, typography, component styling and responsive frontend interfaces. Review its instructions and compatibility before use; it does not grant deployment, data-access or publication permission.
- Optional external skill: [seo-audit](https://github.com/coreyhaines31/marketingskills/blob/main/skills/seo-audit/SKILL.md) — Investigate crawlability, indexing, page metadata, internal linking and on-page content issues. Review its instructions and compatibility before use; it does not grant deployment, data-access or publication permission.
- Optional external skill: [web-design-guidelines](https://github.com/vercel-labs/agent-skills/blob/main/skills/web-design-guidelines/SKILL.md) — Review web interfaces for accessibility, keyboard focus, forms, navigation and interaction quality. Review its instructions and compatibility before use; it does not grant deployment, data-access or publication permission.

Read the linked SKILL.md and its dependencies before adding a skill. Select only the skills matching this project's runtime and task; their documentation does not supply API access, credentials or approval to perform external actions. Pin the reviewed revision where the tool supports it. Follow the chosen agent's documented project-level installation mechanism.

## Distribution ideas
These are optional planning notes. Obtain the owner's approval before publishing or contacting anyone.
- Demonstrate the actual Siter.io-inspired workflow with owned or clearly labeled sample data: Build a visual page editor using a limited set of responsive components and publish static output. Support comments on a reviewed revision, while keeping simultaneous editing outside the first release.
- Publish a reproducible walkthrough with this observable result: A layout overflowing a small viewport is flagged before export; reverting a release restores its matching assets and content.
- Explain who can operate this scoped tool, its setup and ongoing costs, and these remaining product gaps: general-purpose visual editing; large template and component libraries Avoid guaranteed savings, performance scores or implied endorsement.

## Engineering roadmap
1. Phase 1 — Scope and fixtures. Implement this bounded workflow: Build a visual page editor using a limited set of responsive components and publish static output. Support comments on a reviewed revision, while keeping simultaneous editing outside the first release. Record prerequisites, select representative user-owned fixtures and document the unsupported features: general-purpose visual editing; large template and component libraries
2. Phase 2 — Durable model. Model site pages, constrained layout trees, breakpoint tokens, component props and saved revisions Add migrations or a versioned document format, explicit validation, stable IDs and a visible import-error report. Preserve this rule: Absolute visual positioning cannot silently break narrow screens; publication always refers to one complete saved revision.
3. Phase 3 — Complete the first useful path. Implement the workflow's input, review and output interface, with clear controls and explicit empty/error states. Build into a new output directory from a saved content revision. Preview at narrow and wide widths and deploy the complete artifact atomically; retain the previous release.
4. Phase 4 — Permissions and integration failure. Escape content, sanitize Markdown, constrain asset paths and never embed API secrets in the static output. Private content requires a real authenticated server rather than a hidden URL. Request integration credentials and permissions only for the enabled feature; show a disconnected state instead of mock results.
5. Phase 5 — Portable handoff. Export source Markdown/JSON and original assets alongside the generated site. A clean build from that archive must not depend on an editor database. Include setup, operating limits, fixture walkthrough and shutdown/restart instructions in the README.
6. Phase 6 — Acceptance scenarios. A layout overflowing a small viewport is flagged before export; reverting a release restores its matching assets and content. Repeat the workflow after restart and with a denied permission or unavailable dependency; show recoverable failure rather than a success placeholder.

## Paid-product capabilities outside this build
- general-purpose visual editing
- large template and component libraries
- CMS collaboration and client handoff
- managed hosting, forms, and analytics

## Implementation prompt
WORKING SLICE
Build a visual page editor using a limited set of responsive components and publish static output. Support comments on a reviewed revision, while keeping simultaneous editing outside the first release.

Build this scoped Siter.io-inspired workflow with a documented data model and visible failure states.

Architecture
- Eleventy, Markdown content and typed JSON section manifests for a static website.
- A local Node editor/build command with Sharp image processing; generated files publish to a user-owned host.

Prerequisites and limits
Node, a selected output folder, licensed content/assets and a user-owned deployment target. DNS, email delivery and any server-side forms require separate configuration.
Outside this release: general-purpose visual editing; large template and component libraries

Data model and correctness
site pages, constrained layout trees, breakpoint tokens, component props and saved revisions
Invariant: Absolute visual positioning cannot silently break narrow screens; publication always refers to one complete saved revision.
Build into a new output directory from a saved content revision. Preview at narrow and wide widths and deploy the complete artifact atomically; retain the previous release.

Security and privacy
Escape content, sanitize Markdown, constrain asset paths and never embed API secrets in the static output. Private content requires a real authenticated server rather than a hidden URL.

Recovery and export
Export source Markdown/JSON and original assets alongside the generated site. A clean build from that archive must not depend on an editor database.

Implementation order
1. Phase 1 — Scope and fixtures. Implement this bounded workflow: Build a visual page editor using a limited set of responsive components and publish static output. Support comments on a reviewed revision, while keeping simultaneous editing outside the first release. Record prerequisites, select representative user-owned fixtures and document the unsupported features: general-purpose visual editing; large template and component libraries
2. Phase 2 — Durable model. Model site pages, constrained layout trees, breakpoint tokens, component props and saved revisions Add migrations or a versioned document format, explicit validation, stable IDs and a visible import-error report. Preserve this rule: Absolute visual positioning cannot silently break narrow screens; publication always refers to one complete saved revision.
3. Phase 3 — Complete the first useful path. Implement the workflow's input, review and output interface, with clear controls and explicit empty/error states. Build into a new output directory from a saved content revision. Preview at narrow and wide widths and deploy the complete artifact atomically; retain the previous release.
4. Phase 4 — Permissions and integration failure. Escape content, sanitize Markdown, constrain asset paths and never embed API secrets in the static output. Private content requires a real authenticated server rather than a hidden URL. Request integration credentials and permissions only for the enabled feature; show a disconnected state instead of mock results.
5. Phase 5 — Portable handoff. Export source Markdown/JSON and original assets alongside the generated site. A clean build from that archive must not depend on an editor database. Include setup, operating limits, fixture walkthrough and shutdown/restart instructions in the README.
6. Phase 6 — Acceptance scenarios. A layout overflowing a small viewport is flagged before export; reverting a release restores its matching assets and content. Repeat the workflow after restart and with a denied permission or unavailable dependency; show recoverable failure rather than a success placeholder.

Acceptance
A layout overflowing a small viewport is flagged before export; reverting a release restores its matching assets and content.
Use real source data or clearly labeled fixtures. Explain unsupported input and provider failures; do not fabricate analytics, delivery receipts, accuracy claims or security guarantees.

Optional agent guidance
Optional external skill: [frontend-design](https://github.com/anthropics/skills/blob/main/skills/frontend-design/SKILL.md) — Create intentional web layouts, typography, component styling and responsive frontend interfaces. Review its instructions and compatibility before use; it does not grant deployment, data-access or publication permission.
Optional external skill: [seo-audit](https://github.com/coreyhaines31/marketingskills/blob/main/skills/seo-audit/SKILL.md) — Investigate crawlability, indexing, page metadata, internal linking and on-page content issues. Review its instructions and compatibility before use; it does not grant deployment, data-access or publication permission.
Optional external skill: [web-design-guidelines](https://github.com/vercel-labs/agent-skills/blob/main/skills/web-design-guidelines/SKILL.md) — Review web interfaces for accessibility, keyboard focus, forms, navigation and interaction quality. Review its instructions and compatibility before use; it does not grant deployment, data-access or publication permission.
Project rule — data model: site pages, constrained layout trees, breakpoint tokens, component props and saved revisions
Project rule — preserve this invariant: Absolute visual positioning cannot silently break narrow screens; publication always refers to one complete saved revision.
Project rule — acceptance evidence: A layout overflowing a small viewport is flagged before export; reverting a release restores its matching assets and content.

## Completion evidence
Demonstrate the prompt's acceptance scenarios against the scoped workflow. Include setup from a clean checkout and failure recovery. Check persistence across restart and export/restore only for the state the prompt says to store; for memory-only tools, confirm that temporary content is discarded as specified. Record actual results and remaining limitations. A detailed plan alone does not establish a working replacement.