v2.1.79 (+714 tokens)

README.md

@@ -34,7 +34,7 @@ Download it and try it out for free!  **https://piebald.ai/**
 > [!important]
 > **NEW (January 23, 2026): We've added all of Claude Code's ~40 system reminders to this list—see [System Reminders](#system-reminders).**
 
-This repository contains an up-to-date list of all Claude Code's various system prompts and their associated token counts as of **[Claude Code v2.1.78](https://www.npmjs.com/package/@anthropic-ai/claude-code/v/2.1.78) (March 17th, 2026).**  It also contains a [**CHANGELOG.md**](./CHANGELOG.md) for the system prompts across 128 versions since v2.0.14.  From the team behind [<img src="https://github.com/Piebald-AI/piebald/raw/main/assets/logo.svg" width="15"> **Piebald.**](https://piebald.ai/)
+This repository contains an up-to-date list of all Claude Code's various system prompts and their associated token counts as of **[Claude Code v2.1.79](https://www.npmjs.com/package/@anthropic-ai/claude-code/v/2.1.79) (March 18th, 2026).**  It also contains a [**CHANGELOG.md**](./CHANGELOG.md) for the system prompts across 129 versions since v2.0.14.  From the team behind [<img src="https://github.com/Piebald-AI/piebald/raw/main/assets/logo.svg" width="15"> **Piebald.**](https://piebald.ai/)
 
 **This repository is updated within minutes of each Claude Code release.  See the [changelog](./CHANGELOG.md), and follow [@PiebaldAI](https://x.com/PiebaldAI) on X for a summary of the system prompt changes in each release.**
 
@@ -134,7 +134,7 @@ The content of various template files embedded in Claude Code.
 - [Data: Claude API reference — Ruby](./system-prompts/data-claude-api-reference-ruby.md) (**696** tks) - Ruby SDK reference including installation, client initialization, basic requests, streaming, and beta tool runner.
 - [Data: Claude API reference — TypeScript](./system-prompts/data-claude-api-reference-typescript.md) (**2837** tks) - TypeScript SDK reference including installation, client initialization, basic requests, thinking, and multi-turn conversation.
 - [Data: Claude API reference — cURL](./system-prompts/data-claude-api-reference-curl.md) (**1996** tks) - Raw API reference for Claude API for use with cURL or else Raw HTTP.
-- [Data: Claude model catalog](./system-prompts/data-claude-model-catalog.md) (**1558** tks) - Catalog of current and legacy Claude models with exact model IDs, aliases, context windows, and pricing.
+- [Data: Claude model catalog](./system-prompts/data-claude-model-catalog.md) (**2295** tks) - Catalog of current and legacy Claude models with exact model IDs, aliases, context windows, and pricing.
 - [Data: Files API reference — Python](./system-prompts/data-files-api-reference-python.md) (**1334** tks) - Python Files API reference including file upload, listing, deletion, and usage in messages.
 - [Data: Files API reference — TypeScript](./system-prompts/data-files-api-reference-typescript.md) (**797** tks) - TypeScript Files API reference including file upload, listing, deletion, and usage in messages.
 - [Data: GitHub Actions workflow for @claude mentions](./system-prompts/data-github-actions-workflow-for-claude-mentions.md) (**527** tks) - GitHub Actions workflow template for triggering Claude Code via @claude mentions.
@@ -200,11 +200,10 @@ Parts of the main system prompt.
 - [System Prompt: Skillify Current Session](./system-prompts/system-prompt-skillify-current-session.md) (**1882** tks) - System prompt for converting the current session in to a skill.
 - [System Prompt: Subagent delegation examples](./system-prompts/system-prompt-subagent-delegation-examples.md) (**588** tks) - Provides example interactions showing how a coordinator agent should delegate tasks to subagents, handle waiting states, and report results.
 - [System Prompt: System section](./system-prompts/system-prompt-system-section.md) (**156** tks) - System section of the main system prompt.
-- [System Prompt: Team memory content display](./system-prompts/system-prompt-team-memory-content-display.md) (**52** tks) - Renders shared team memory file contents with path and content for injection into the conversation context.
+- [System Prompt: Team memory content display](./system-prompts/system-prompt-team-memory-content-display.md) (**55** tks) - Renders shared team memory file contents with path and content for injection into the conversation context.
 - [System Prompt: Teammate Communication](./system-prompts/system-prompt-teammate-communication.md) (**130** tks) - System prompt for teammate communication in swarm.
 - [System Prompt: Tone and style (code references)](./system-prompts/system-prompt-tone-and-style-code-references.md) (**39** tks) - Instruction to include file_path:line_number when referencing code.
 - [System Prompt: Tone and style (concise output — short)](./system-prompts/system-prompt-tone-and-style-concise-output-short.md) (**16** tks) - Instruction for short and concise responses.
-- [System Prompt: Tool Use Summary Generation](./system-prompts/system-prompt-tool-use-summary-generation.md) (**171** tks) - Prompt for generating summaries of tool usage.
 - [System Prompt: Tool execution denied](./system-prompts/system-prompt-tool-execution-denied.md) (**144** tks) - System prompt for when tool execution is denied.
 - [System Prompt: Tool usage (create files)](./system-prompts/system-prompt-tool-usage-create-files.md) (**30** tks) - Prefer Write tool instead of cat heredoc or echo redirection.
 - [System Prompt: Tool usage (delegate exploration)](./system-prompts/system-prompt-tool-usage-delegate-exploration.md) (**95** tks) - Use Task tool for broader codebase exploration and deep research.
@@ -243,7 +242,7 @@ Text for large system reminders.
 - [System Reminder: MCP resource no content](./system-prompts/system-reminder-mcp-resource-no-content.md) (**41** tks) - Shown when MCP resource has no content.
 - [System Reminder: MCP resource no displayable content](./system-prompts/system-reminder-mcp-resource-no-displayable-content.md) (**43** tks) - Shown when MCP resource has no displayable content.
 - [System Reminder: Malware analysis after Read tool call](./system-prompts/system-reminder-malware-analysis-after-read-tool-call.md) (**87** tks) - Instructions for analyzing malware without improving or augmenting it.
-- [System Reminder: Memory file contents](./system-prompts/system-reminder-memory-file-contents.md) (**38** tks) - Contents of a memory file by path.
+- [System Reminder: Memory file contents](./system-prompts/system-reminder-memory-file-contents.md) (**36** tks) - Contents of a memory file by path.
 - [System Reminder: Nested memory contents](./system-prompts/system-reminder-nested-memory-contents.md) (**33** tks) - Contents of a nested memory file.
 - [System Reminder: New diagnostics detected](./system-prompts/system-reminder-new-diagnostics-detected.md) (**35** tks) - Notification about new diagnostic issues.
 - [System Reminder: Output style active](./system-prompts/system-reminder-output-style-active.md) (**32** tks) - Notification that an output style is active.
@@ -266,7 +265,7 @@ Text for large system reminders.
 
 - [Tool Description: AskUserQuestion](./system-prompts/tool-description-askuserquestion.md) (**287** tks) - Tool description for asking user questions.
 - [Tool Description: Computer](./system-prompts/tool-description-computer.md) (**161** tks) - Main description for the Chrome browser computer automation tool.
-- [Tool Description: CronCreate](./system-prompts/tool-description-croncreate.md) (**738** tks) - Describes the CronCreate tool for enqueuing one-shot or recurring cron-based jobs with jitter and off-minute scheduling guidance.
+- [Tool Description: CronCreate](./system-prompts/tool-description-croncreate.md) (**754** tks) - Describes the CronCreate tool for enqueuing one-shot or recurring cron-based jobs with jitter and off-minute scheduling guidance.
 - [Tool Description: Edit](./system-prompts/tool-description-edit.md) (**246** tks) - Tool for performing exact string replacements in files.
 - [Tool Description: EnterPlanMode](./system-prompts/tool-description-enterplanmode.md) (**878** tks) - Tool description for entering plan mode to explore and design implementation approaches.
 - [Tool Description: EnterWorktree](./system-prompts/tool-description-enterworktree.md) (**359** tks) - Tool description for the EnterWorktree tool.
@@ -347,10 +346,10 @@ Text for large system reminders.
 Built-in skill prompts for specialized tasks.
 
 - [Skill: /init CLAUDE.md and skill setup (new version)](./system-prompts/skill-init-claudemd-and-skill-setup-new-version.md) (**4783** tks) - A comprehensive onboarding flow for setting up CLAUDE.md and related skills/hooks in the current repository, including codebase exploration, user interviews, and iterative proposal refinement.
-- [Skill: /loop slash command](./system-prompts/skill-loop-slash-command.md) (**1033** tks) - Parses user input into an interval and prompt, converts the interval to a cron expression, and schedules a recurring task.
+- [Skill: /loop slash command](./system-prompts/skill-loop-slash-command.md) (**1040** tks) - Parses user input into an interval and prompt, converts the interval to a cron expression, and schedules a recurring task.
 - [Skill: /stuck slash command](./system-prompts/skill-stuck-slash-command.md) (**964** tks) - Diagnozse frozen or slow Claude Code sessions.
 - [Skill: Build with Claude API (reference guide)](./system-prompts/skill-build-with-claude-api-reference-guide.md) (**410** tks) - Template for presenting language-specific reference documentation with quick task navigation.
-- [Skill: Build with Claude API](./system-prompts/skill-build-with-claude-api.md) (**5255** tks) - Main routing guide for building LLM-powered applications with Claude, including language detection, surface selection, and architecture overview.
+- [Skill: Build with Claude API](./system-prompts/skill-build-with-claude-api.md) (**5379** tks) - Main routing guide for building LLM-powered applications with Claude, including language detection, surface selection, and architecture overview.
 - [Skill: Create verifier skills](./system-prompts/skill-create-verifier-skills.md) (**2625** tks) - Prompt for creating verifier skills for the Verify agent to automatically verify code changes.
 - [Skill: Debugging](./system-prompts/skill-debugging.md) (**412** tks) - Instructions for debugging an issue that the user is encountering in the Claude Code session.
 - [Skill: Simplify](./system-prompts/skill-simplify.md) (**822** tks) - Instructions for simplifying code.

system-prompts/data-claude-model-catalog.md

@@ -1,11 +1,62 @@
 <!--
 name: 'Data: Claude model catalog'
 description: Catalog of current and legacy Claude models with exact model IDs, aliases, context windows, and pricing
-ccVersion: 2.1.73
+ccVersion: 2.1.79
 -->
 # Claude Model Catalog
 
-**Only use exact model IDs listed in this file.** Never guess or construct model IDs — incorrect IDs will cause API errors. Use aliases wherever available. For the latest information, WebFetch the Models Overview URL in \`shared/live-sources.md\`.
+**Only use exact model IDs listed in this file.** Never guess or construct model IDs — incorrect IDs will cause API errors. Use aliases wherever available. For the latest information, WebFetch the Models Overview URL in \`shared/live-sources.md\`, or query the Models API directly (see Programmatic Model Discovery below).
+
+## Programmatic Model Discovery
+
+For **live** capability data — context window, max output tokens, feature support (thinking, vision, effort, structured outputs, etc.) — query the Models API instead of relying on the cached tables below. Use this when the user asks "what's the context window for X", "does model X support vision/thinking/effort", "which models support feature Y", or wants to select a model by capability at runtime.
+
+\`\`\`python
+m = client.models.retrieve("claude-opus-4-6")
+m.id                 # "claude-opus-4-6"
+m.display_name       # "Claude Opus 4.6"
+m.max_input_tokens   # context window (int)
+m.max_tokens         # max output tokens (int)
+
+# capabilities is an untyped nested dict — bracket access, check ["supported"] at the leaf
+caps = m.capabilities
+caps["image_input"]["supported"]                       # vision
+caps["thinking"]["types"]["adaptive"]["supported"]     # adaptive thinking
+caps["effort"]["max"]["supported"]                     # effort: max (also low/medium/high)
+caps["structured_outputs"]["supported"]
+caps["context_management"]["compact_20260112"]["supported"]
+
+# filter across all models — iterate the page object directly (auto-paginates); do NOT use .data
+[m for m in client.models.list()
+ if m.capabilities["thinking"]["types"]["adaptive"]["supported"]
+ and m.max_input_tokens >= 200_000]
+\`\`\`
+
+Top-level fields (\`id\`, \`display_name\`, \`max_input_tokens\`, \`max_tokens\`) are typed attributes. \`capabilities\` is a dict — use bracket access, not attribute access. The API returns the full capability tree for every model with \`supported: true/false\` at each leaf, so bracket chains are safe without \`.get()\` guards. TypeScript SDK: same method names, also auto-paginates on iteration.
+
+### Raw HTTP
+
+\`\`\`bash
+curl https://api.anthropic.com/v1/models/claude-opus-4-6 \\
+  -H "x-api-key: $ANTHROPIC_API_KEY" \\
+  -H "anthropic-version: 2023-06-01"
+\`\`\`
+
+\`\`\`json
+{
+  "id": "claude-opus-4-6",
+  "display_name": "Claude Opus 4.6",
+  "max_input_tokens": 1000000,
+  "max_tokens": 128000,
+  "capabilities": {
+    "image_input": {"supported": true},
+    "structured_outputs": {"supported": true},
+    "thinking": {"supported": true, "types": {"enabled": {"supported": true}, "adaptive": {"supported": true}}},
+    "effort": {"supported": true, "low": {"supported": true}, …, "max": {"supported": true}},
+    …
+  }
+}
+\`\`\`
 
 ## Current Models (recommended)
 

system-prompts/skill-build-with-claude-api.md

@@ -1,7 +1,7 @@
 <!--
 name: 'Skill: Build with Claude API'
 description: Main routing guide for building LLM-powered applications with Claude, including language detection, surface selection, and architecture overview
-ccVersion: 2.1.78
+ccVersion: 2.1.79
 -->
 # Building LLM-Powered Applications with Claude
 
@@ -125,7 +125,7 @@ Everything goes through \`POST /v1/messages\`. Tools and output constraints are
 
 **Structured outputs** — Constrains the Messages API response format (\`output_config.format\`) and/or tool parameter validation (\`strict: true\`). The recommended approach is \`client.messages.parse()\` which validates responses against your schema automatically. Note: the old \`output_format\` parameter is deprecated; use \`output_config: {format: {...}}\` on \`messages.create()\`.
 
-**Supporting endpoints** — Batches (\`POST /v1/messages/batches\`), Files (\`POST /v1/files\`), and Token Counting feed into or support Messages API requests.
+**Supporting endpoints** — Batches (\`POST /v1/messages/batches\`), Files (\`POST /v1/files\`), Token Counting, and Models (\`GET /v1/models\`, \`GET /v1/models/{id}\` — live capability/context-window discovery) feed into or support Messages API requests.
 
 ---
 
@@ -143,6 +143,8 @@ Everything goes through \`POST /v1/messages\`. Tools and output constraints are
 
 A note: if any of the model strings above look unfamiliar to you, that's to be expected — that just means they were released after your training data cutoff. Rest assured they are real models; we wouldn't mess with you like that.
 
+**Live capability lookup:** The table above is cached. When the user asks "what's the context window for X", "does X support vision/thinking/effort", or "which models support Y", query the Models API (\`client.models.retrieve(id)\` / \`client.models.list()\`) — see \`shared/models.md\` for the field reference and capability-filter examples.
+
 ---
 
 ## Thinking & Effort (Quick Reference)

system-prompts/skill-loop-slash-command.md

@@ -1,11 +1,12 @@
 <!--
 name: 'Skill: /loop slash command'
 description: Parses user input into an interval and prompt, converts the interval to a cron expression, and schedules a recurring task
-ccVersion: 2.1.77
+ccVersion: 2.1.79
 variables:
   - CRON_CREATE_TOOL_NAME
   - DEFAULT_INTERVAL
-  - CRON_CANCEL_TOOL_NAME
+  - CANCEL_TIMEFRAME_DAYS
+  - CRON_DELETE_TOOL_NAME
   - USER_INPUT
 -->
 # /loop — schedule a recurring prompt
@@ -48,7 +49,7 @@ Supported suffixes: \`s\` (seconds, rounded up to nearest minute, min 1), \`m\`
    - \`cron\`: the expression from the table above
    - \`prompt\`: the parsed prompt from above, verbatim (slash commands are passed through unchanged)
    - \`recurring\`: \`true\`
-2. Briefly confirm: what's scheduled, the cron expression, the human-readable cadence, that recurring tasks auto-expire after 3 days, and that they can cancel sooner with ${CRON_CANCEL_TOOL_NAME} (include the job ID).
+2. Briefly confirm: what's scheduled, the cron expression, the human-readable cadence, that recurring tasks auto-expire after ${CANCEL_TIMEFRAME_DAYS} days, and that they can cancel sooner with ${CRON_DELETE_TOOL_NAME} (include the job ID).
 3. **Then immediately execute the parsed prompt now** — don't wait for the first cron fire. If it's a slash command, invoke it via the Skill tool; otherwise act on it directly.
 
 ## Input

system-prompts/system-prompt-team-memory-content-display.md

@@ -1,13 +1,14 @@
 <!--
 name: 'System Prompt: Team memory content display'
 description: Renders shared team memory file contents with path and content for injection into the conversation context
-ccVersion: 2.1.71
+ccVersion: 2.1.79
 variables:
-  - MEMORY_FILE
+  - MEMORY_ITEM
-  - INSTRUCTIONS_TYPE
+  - MEMORY_TYPE_DESCRIPTION
+  - MEMORY_CONTENT
 -->
-Contents of ${MEMORY_FILE.path}${INSTRUCTIONS_TYPE}:
+Contents of ${MEMORY_ITEM.path}${MEMORY_TYPE_DESCRIPTION}:
 
 <team-memory-content source="shared">
-${MEMORY_FILE.content}
+${MEMORY_CONTENT}
 </team-memory-content>

system-prompts/system-prompt-tool-use-summary-generation.md

@@ -1,21 +0,0 @@
-<!--
-name: 'System Prompt: Tool Use Summary Generation'
-description: Prompt for generating summaries of tool usage
-ccVersion: 2.1.19
--->
-You summarize what was accomplished by a coding assistant.
-Given the tools executed and their results, provide a brief summary.
-
-Rules:
-- Use past tense (e.g., "Read package.json", "Fixed type error in utils.ts")
-- Be specific about what was done
-- Keep under 8 words
-- Do not include phrases like "I did" or "The assistant" - just describe what happened
-- Focus on the user-visible outcome, not implementation details
-
-Examples:
-- "Searched codebase for authentication code"
-- "Read and analyzed Message.tsx component"
-- "Fixed null pointer exception in data processor"
-- "Created new user registration endpoint"
-- "Ran tests and fixed 3 failing assertions"

system-prompts/system-reminder-memory-file-contents.md

@@ -1,11 +1,12 @@
 <!--
 name: 'System Reminder: Memory file contents'
 description: Contents of a memory file by path
-ccVersion: 2.1.18
+ccVersion: 2.1.79
 variables:
   - MEMORY_ITEM
   - MEMORY_TYPE_DESCRIPTION
+  - MEMORY_CONTENT
 -->
 Contents of ${MEMORY_ITEM.path}${MEMORY_TYPE_DESCRIPTION}:
 
-${MEMORY_ITEM.content}
+${MEMORY_CONTENT}

system-prompts/tool-description-croncreate.md

@@ -1,8 +1,9 @@
 <!--
 name: 'Tool Description: CronCreate'
 description: Describes the CronCreate tool for enqueuing one-shot or recurring cron-based jobs with jitter and off-minute scheduling guidance
-ccVersion: 2.1.71
+ccVersion: 2.1.79
 variables:
+  - CANCEL_TIMEFRAME_DAYS
   - CRON_DELETE_TOOL_NAME
 -->
 Schedule a prompt to be enqueued at a future time. Use for both recurring schedules and one-shot reminders.
@@ -38,6 +39,6 @@ Jobs live only in this Claude session — nothing is written to disk, and the jo
 
 Jobs only fire while the REPL is idle (not mid-query). ${""}The scheduler adds a small deterministic jitter on top of whatever you pick: recurring tasks fire up to 10% of their period late (max 15 min); one-shot tasks landing on :00 or :30 fire up to 90 s early. Picking an off-minute is still the bigger lever.
 
-Recurring tasks auto-expire after 3 days — they fire one final time, then are deleted. This bounds session lifetime. Tell the user about the 3-day limit when scheduling recurring jobs.
+Recurring tasks auto-expire after ${CANCEL_TIMEFRAME_DAYS} days — they fire one final time, then are deleted. This bounds session lifetime. Tell the user about the ${CANCEL_TIMEFRAME_DAYS}-day limit when scheduling recurring jobs.
 
 Returns a job ID you can pass to ${CRON_DELETE_TOOL_NAME}.