started prompt mechanics

docs/uris.md

@@ -15,6 +15,9 @@ The public, preferred URIs are:
 3. `resource://skills/{skill_id}/document`
 4. `resource://skills/{skill_id}/references/{ref_id}`
 5. `resource://docs/{path*}`
+6. `resource://catalog/prompts_index`
+7. `resource://catalog/prompts/{prompt_id}`
+8. `resource://prompts/{prompt_id}/document`
 
 Contract intent:
 
@@ -52,6 +55,23 @@ Contract intent:
 2. Supports nested paths via RFC6570 wildcard expansion.
 3. Typical examples include `index.md`, `usage.md`, `skills/<skill-id>/SKILL.md`, and `skills/<skill-id>/references/<file>.md`.
 
+### `resource://catalog/prompts_index`
+
+1. Returns a compact list of prompt records for discovery.
+2. Contains one entry per `prompt_id`.
+3. Includes `id`, `name`, `description`, `tags`, `version`, and canonical document URI.
+
+### `resource://catalog/prompts/{prompt_id}`
+
+1. Returns one normalized record for `prompt_id`.
+2. Includes prompt argument metadata when declared in frontmatter.
+3. Returns not found when `prompt_id` does not exist.
+
+### `resource://prompts/{prompt_id}/document`
+
+1. Returns the canonical prompt markdown document.
+2. `prompt_id` must satisfy lowercase kebab-case rules.
+
 ## Template Parameter And Validation Rules
 
 ### `skill_id`
@@ -72,6 +92,11 @@ Contract intent:
 4. Resolves only inside `docs/`.
 5. Markdown-only in the end state, meaning `.md` files.
 
+### `prompt_id`
+
+1. Lowercase kebab-case.
+2. Must be unique across prompt ids and must not collide with skill ids.
+
 ## URI Versioning Policy
 
 Default rule: