Add prompt-snippets plugin with /ps command

[AnExiledDev]

Summary

New plugin providing quick behavioral mode switches via a single /ps slash command. Derived from session history analysis of 232 user messages across 73 sessions identifying the most frequently typed directives.

• Single dispatcher skill — one /ps command with $ARGUMENTS lookup, not 8 separate skills
• 8 snippets: noaction, brief, plan, go, review, ship, deep, hold
• Composable — /ps noaction brief applies multiple snippets
• Isolated — disable-model-invocation: true keeps it out of auto-suggestion; own plugin with independent enabledPlugins toggle
• Extensible — add a row to the table to create new snippets

Usage

/ps noaction      → "Investigate and report only. Take no action."
/ps brief         → "Be concise. Short answers, no filler."
/ps go            → "Proceed without confirmation."
/ps noaction brief → Both applied, composable

Files

• New: plugins/prompt-snippets/ (plugin.json, SKILL.md, README.md)
• Modified: marketplace.json (register plugin), settings.json (enable plugin), CHANGELOG.md

Test plan

• Rebuild container and verify /ps appears as a slash command
• Test /ps noaction — Claude acknowledges mode and restricts to investigation
• Test /ps brief — Claude responds concisely
• Test /ps with no args — lists available snippets
• Verify /ps does NOT appear in auto-suggestions during normal prompts
• Verify plugin can be disabled via enabledPlugins toggle

Summary by CodeRabbit

• New Features

  • Added Prompt Snippets Plugin with /ps slash command for quick behavioral mode switches
  • Ten available modes: noaction, brief, plan, go, review, ship, deep, hold, recall, wait
  • Supports composable usage to apply multiple snippets simultaneously
  • Plugin is independently toggleable and will not auto-suggest

• Documentation

  • Added usage guide and examples for /ps, composing snippets, and extending snippet list

• Chores

  • Plugin enabled by default in runtime configuration

[coderabbitai]

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📥 Commits

Reviewing files that changed from the base of the PR and between 6feb1e3 and a947776.

📒 Files selected for processing (7)

• .devcontainer/CHANGELOG.md
• .devcontainer/CLAUDE.md
• .devcontainer/config/defaults/settings.json
• .devcontainer/plugins/devs-marketplace/.claude-plugin/marketplace.json
• .devcontainer/plugins/devs-marketplace/plugins/prompt-snippets/.claude-plugin/plugin.json
• .devcontainer/plugins/devs-marketplace/plugins/prompt-snippets/README.md
• .devcontainer/plugins/devs-marketplace/plugins/prompt-snippets/skills/ps/SKILL.md

📝 Walkthrough

Walkthrough

Adds a new Prompt Snippets Plugin that provides a /ps slash command to inject persistent behavioral directives (examples: noaction, brief, plan, go, review, ship, deep, hold, recall, wait) and allows composing multiple snippets; the plugin is toggleable via runtime settings.

Changes

Cohort / File(s)	Summary
Devcontainer config .devcontainer/config/defaults/settings.json	Enables the prompt-snippets@devs-marketplace plugin in enabledPlugins.
Marketplace registry .devcontainer/plugins/devs-marketplace/.claude-plugin/marketplace.json	Appends a new prompt-snippets entry to the marketplace plugin list (metadata: name, description, version, source, category, keywords).
Plugin manifest .devcontainer/plugins/devs-marketplace/plugins/prompt-snippets/.claude-plugin/plugin.json	Adds plugin descriptor with name, description, and author metadata.
Plugin docs .devcontainer/plugins/devs-marketplace/plugins/prompt-snippets/README.md, .devcontainer/plugins/devs-marketplace/plugins/prompt-snippets/skills/ps/SKILL.md	Adds README and SKILL.md documenting /ps usage, available snippets, composition rules, examples, and design constraints (disable-model-invocation, toggleable via settings).
Top-level docs .devcontainer/CHANGELOG.md, .devcontainer/CLAUDE.md	Adds changelog entry and plugin listing for prompt-snippets.

Estimated code review effort

🎯 3 (Moderate) | ⏱️ ~20 minutes

Poem

🐰 I nibble a snippet, a hop and a cheer,
/ps whispers modes that stick close and near.
Brief, plan, deep — I stack them with care,
A rabbit's small patch of directive-flavored air. ✨

🚥 Pre-merge checks | ✅ 3

✅ Passed checks (3 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title clearly and concisely summarizes the main change: introducing a new prompt-snippets plugin with a /ps command.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.

_{✏️ Tip: You can configure your own custom pre-merge checks in the settings.}

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Post copyable unit tests in a comment
• Commit unit tests in branch feature/prompt-snippets

---

_{Comment @coderabbitai help to get the list of available commands and usage tips.}

[coderabbitai]

Actionable comments posted: 3

🤖 Prompt for all review comments with AI agents

Verify each finding against the current code and only fix it if needed.

Inline comments:
In
@.devcontainer/plugins/devs-marketplace/plugins/prompt-snippets/.claude-plugin/plugin.json:
- Around line 1-5: Open the CLAUDE.md Plugins section and add a new Plugins list
item for the plugin named "prompt-snippets": insert the bullet `-
**prompt-snippets** — Quick behavioral mode switches via /ps command` into the
existing Plugins list so the plugin appears alongside the other 11 entries
(ensure spelling and punctuation match the plugin.json name and description).

In @.devcontainer/plugins/devs-marketplace/plugins/prompt-snippets/README.md:
- Around line 7-9: The fenced code blocks showing the command examples (the
blocks containing "/ps [snippet-name]" and "/ps noaction brief") need language
specifiers to silence MD040; edit the README.md usage examples and change the
opening triple-backtick from ``` to ```text for both command blocks so they
become fenced as text code blocks.

In
@.devcontainer/plugins/devs-marketplace/plugins/prompt-snippets/skills/ps/SKILL.md:
- Around line 31-33: Add a language tag to the fenced code block containing the
example "/ps noaction brief" so markdownlint MD040 is not triggered; update the
triple-backtick fence that surrounds "/ps noaction brief" to include a language
identifier such as text or shell (e.g., ```text) while leaving the block content
unchanged.

---

ℹ️ Review info

Configuration used: defaults

Review profile: CHILL

Plan: Pro

📥 Commits

Reviewing files that changed from the base of the PR and between d2ba55e and 5d9d7ad.

📒 Files selected for processing (6)

• .devcontainer/CHANGELOG.md
• .devcontainer/config/defaults/settings.json
• .devcontainer/plugins/devs-marketplace/.claude-plugin/marketplace.json
• .devcontainer/plugins/devs-marketplace/plugins/prompt-snippets/.claude-plugin/plugin.json
• .devcontainer/plugins/devs-marketplace/plugins/prompt-snippets/README.md
• .devcontainer/plugins/devs-marketplace/plugins/prompt-snippets/skills/ps/SKILL.md

[coderabbitai]

🧹 Nitpick comments (1)

.devcontainer/CHANGELOG.md (1)

5-11: LGTM on structure; consider dropping the internal config key from Line 11.

Lines 8–10 are cleanly user-facing. Line 11 leaks the implementation detail disable-model-invocation: true into the changelog. Per the coding guidelines, entries should describe what changed for the user, not how it was implemented.

✏️ Suggested wording

-  - Isolated from skill-engine auto-suggestion (`disable-model-invocation: true`) and independently toggleable via `enabledPlugins`
+  - Does not appear in skill-engine auto-suggestions; can be independently enabled/disabled via `enabledPlugins`

As per coding guidelines: "Write CHANGELOG entries from the user's perspective — what changed, not how it was implemented."

🤖 Prompt for AI Agents

Verify each finding against the current code and only fix it if needed.

In @.devcontainer/CHANGELOG.md around lines 5 - 11, The changelog leaks an
internal config key—remove the implementation detail `disable-model-invocation:
true` from the Prompt Snippets Plugin entry and replace it with user-facing
wording that conveys the same behavior (e.g., "isolated from skill-engine
auto-suggestions" or "does not trigger model auto-suggestions"); keep the
user-visible toggle note about `enabledPlugins` if desired and ensure references
to `prompt-snippets` and `/ps` remain unchanged.

🤖 Prompt for all review comments with AI agents

Verify each finding against the current code and only fix it if needed.

Nitpick comments:
In @.devcontainer/CHANGELOG.md:
- Around line 5-11: The changelog leaks an internal config key—remove the
implementation detail `disable-model-invocation: true` from the Prompt Snippets
Plugin entry and replace it with user-facing wording that conveys the same
behavior (e.g., "isolated from skill-engine auto-suggestions" or "does not
trigger model auto-suggestions"); keep the user-visible toggle note about
`enabledPlugins` if desired and ensure references to `prompt-snippets` and `/ps`
remain unchanged.

---

ℹ️ Review info

Configuration used: defaults

Review profile: CHILL

Plan: Pro

📥 Commits

Reviewing files that changed from the base of the PR and between 5d9d7ad and 6feb1e3.

📒 Files selected for processing (7)

• .devcontainer/CHANGELOG.md
• .devcontainer/CLAUDE.md
• .devcontainer/config/defaults/settings.json
• .devcontainer/plugins/devs-marketplace/.claude-plugin/marketplace.json
• .devcontainer/plugins/devs-marketplace/plugins/prompt-snippets/.claude-plugin/plugin.json
• .devcontainer/plugins/devs-marketplace/plugins/prompt-snippets/README.md
• .devcontainer/plugins/devs-marketplace/plugins/prompt-snippets/skills/ps/SKILL.md

🚧 Files skipped from review as they are similar to previous changes (4)

• .devcontainer/config/defaults/settings.json
• .devcontainer/plugins/devs-marketplace/.claude-plugin/marketplace.json
• .devcontainer/plugins/devs-marketplace/plugins/prompt-snippets/.claude-plugin/plugin.json
• .devcontainer/plugins/devs-marketplace/plugins/prompt-snippets/README.md