From 4f22b8f7b1fac63d31d196c6e01cd9ee96fa44c0 Mon Sep 17 00:00:00 2001
From: Claude <noreply@anthropic.com>
Date: Sat, 21 Feb 2026 11:20:50 +0000
Subject: [PATCH 01/15] docs: add skill writer design doc

Design for agent self-authoring skills with hot-reload (Approach A):
- write_skill_file + reload_skills tools in agent.rs
- RwLock<SkillRegistry> for live updates
- creating-skills SKILL.md as the instruction layer

https://claude.ai/code/session_01V5qMEXBhQQuKHeot52gxEh
---
 docs/plans/2026-02-21-skill-writer-design.md | 196 +++++++++++++++++++
 1 file changed, 196 insertions(+)
 create mode 100644 docs/plans/2026-02-21-skill-writer-design.md

diff --git a/docs/plans/2026-02-21-skill-writer-design.md b/docs/plans/2026-02-21-skill-writer-design.md
new file mode 100644
index 0000000..81deb6e
--- /dev/null
+++ b/docs/plans/2026-02-21-skill-writer-design.md
@@ -0,0 +1,196 @@
+# Design: Skill Writer — Agent Self-Authoring Skills with Hot-Reload
+
+**Date:** 2026-02-21
+**Status:** Approved
+
+---
+
+## Goal
+
+Enable the RustFox Telegram bot to:
+1. Interactively author new agent skills in the correct format at a user's request
+2. Write multi-file skill directories (SKILL.md + supporting reference/template/script files)
+3. Hot-reload skills into memory immediately — no bot restart required
+
+---
+
+## Architecture Overview
+
+Three components work together:
+
+```
+skills/creating-skills/SKILL.md
+  (new instruction file)
+  • Teaches agent the SKILL.md format and best practices
+  • Guides agent to call write_skill_file() for each file
+  • Tells agent to call reload_skills() when done
+        │
+        │ injected into system prompt
+        ▼
+Agent (src/agent.rs)
+  skills: RwLock<SkillRegistry>   ◄──┐
+                                       │
+  write_skill_file(skill_name,         │
+                   relative_path,      │
+                   content)            │
+    → creates skills/<name>/<path>     │
+                                       │
+  reload_skills()                      │
+    → reloads dir → writes RwLock ─────┘
+
+  process_message()
+    → always rebuilds messages[0]
+      from current live registry
+      (in-memory only, DB keeps historical system message)
+```
+
+**Hot-reload flow:**
+1. User asks agent to create a skill
+2. Agent calls `write_skill_file` one or more times (building the directory)
+3. Agent calls `reload_skills` → registry updated in RwLock
+4. `process_message` rebuilds system prompt from live registry before each LLM call
+5. Skill is immediately active in the same conversation — no restart needed
+
+---
+
+## Chosen Approach: Approach A (Dedicated Skill Management Tools)
+
+Rejected alternatives:
+- **Approach B** (extend `write_file` sandbox): Muddles security model; sandbox designed for one root
+- **Approach C** (pure SKILL.md, no Rust changes): `execute_command` is also sandboxed; can't reach `skills/`
+
+---
+
+## Rust Changes — `src/agent.rs` only
+
+### 1. Field type change
+
+```rust
+// before
+pub skills: SkillRegistry,
+
+// after
+pub skills: tokio::sync::RwLock<SkillRegistry>,
+```
+
+`Agent::new` wraps: `skills: tokio::sync::RwLock::new(skills)`
+
+### 2. `build_system_prompt` becomes async
+
+```rust
+async fn build_system_prompt(&self) -> String {
+    let skills = self.skills.read().await;
+    let skill_context = skills.build_context();
+    // ... same body as before
+}
+```
+
+All call sites in `process_message` already `await`.
+
+### 3. `process_message` — always-fresh system prompt
+
+```rust
+let current_system_prompt = self.build_system_prompt().await;
+if messages.is_empty() {
+    // First message: save to DB as before
+    let system_msg = ChatMessage {
+        role: "system".to_string(),
+        content: Some(current_system_prompt),
+        tool_calls: None,
+        tool_call_id: None,
+    };
+    self.memory.save_message(&conversation_id, &system_msg).await?;
+    messages.push(system_msg);
+} else {
+    // Existing conversation: refresh in-memory only
+    // DB retains historical system message; live calls always use fresh one
+    messages[0].content = Some(current_system_prompt);
+}
+```
+
+### 4. Two new tools
+
+Added to a new `skill_tool_definitions()` method, `all_tool_definitions()`, the agentic loop tool list, and `execute_tool()`:
+
+#### `write_skill_file`
+
+| Parameter | Type | Description |
+|-----------|------|-------------|
+| `skill_name` | string | Skill directory name: lowercase letters, numbers, hyphens only (max 64 chars) |
+| `relative_path` | string | Path within skill dir, e.g. `SKILL.md`, `reference.md`, `scripts/helper.py` |
+| `content` | string | Full file content to write |
+
+Behaviour:
+- Validates `skill_name`: regex `^[a-z0-9-]{1,64}$`
+- Validates `relative_path`: no `..` components, forward slashes only
+- Creates `config.skills.directory / skill_name / relative_path`
+- Creates parent directories automatically
+- Returns path written on success
+
+#### `reload_skills`
+
+No parameters. Calls `load_skills_from_dir(&self.config.skills.directory)`, acquires write lock, replaces registry, returns count of loaded skills.
+
+---
+
+## New Skill File — `skills/creating-skills/SKILL.md`
+
+Named `creating-skills` (gerund form per official best practices).
+
+### YAML frontmatter
+
+```yaml
+---
+name: creating-skills
+description: Use when the user asks to create, write, or add a new bot skill, or wants to teach the bot a new behavior or capability.
+tags: [skills, meta]
+---
+```
+
+### Instruction body — what the agent does
+
+1. **Gather** — Ask user: skill name (slug), what it does, when it should trigger, whether supporting reference/template/script files are needed
+2. **Design** — Plan the file structure:
+   - `SKILL.md` always (main entry point)
+   - Optional: `reference.md`, `examples.md`, `templates/`, `scripts/` — one level deep per best practices
+3. **Write** — Call `write_skill_file` once per file
+4. **Activate** — Call `reload_skills` immediately after
+5. **Confirm** — Report to user: skill is live, list files created
+
+### SKILL.md content the agent writes follows official best practices
+
+- YAML frontmatter: `name` + `description` only
+- `description`: starts with "Use when...", third person, no workflow summary, max 1024 chars
+- `name`: lowercase letters, numbers, hyphens, max 64 chars, no reserved words
+- Body under 500 lines; heavy content split into separate reference files
+- References kept one level deep from SKILL.md (no nested chains)
+- No time-sensitive content
+- Consistent terminology throughout
+
+---
+
+## Files Touched
+
+| File | Change |
+|------|--------|
+| `src/agent.rs` | RwLock wrapping, async build_system_prompt, always-fresh messages[0], two new tools + handlers |
+| `skills/creating-skills/SKILL.md` | New skill file (no code changes needed) |
+
+No other files require modification.
+
+---
+
+## Security Notes
+
+- `write_skill_file` validates `skill_name` with strict regex (no traversal possible via name)
+- `relative_path` is checked for `..` components before joining
+- Skills directory is separate from the user sandbox — no cross-contamination
+- `reload_skills` only reads from the configured `skills.directory`
+
+---
+
+## Open Questions (resolved)
+
+- **Single vs multi-file tool**: Chose single `write_skill_file(skill_name, relative_path, content)` — more extensible, handles full directory structures
+- **Hot-reload scope**: In-memory only; DB keeps historical system message intact
+- **Skill name for this feature**: `creating-skills` (gerund, follows official naming convention)

From 055fbb7114d366b96875adae75aded28763030fe Mon Sep 17 00:00:00 2001
From: Claude <noreply@anthropic.com>
Date: Sat, 21 Feb 2026 11:25:32 +0000
Subject: [PATCH 02/15] docs: add skill writer implementation plan

7-task TDD plan covering:
- Validation helpers + tests (Task 1)
- RwLock<SkillRegistry> + async build_system_prompt (Task 2)
- Always-fresh system prompt in process_message (Task 3)
- skill_tool_definitions() method (Task 4)
- write_skill_file + reload_skills handlers (Task 5)
- creating-skills SKILL.md (Task 6)
- Lint, format, push (Task 7)

https://claude.ai/code/session_01V5qMEXBhQQuKHeot52gxEh
---
 docs/plans/2026-02-21-skill-writer.md | 701 ++++++++++++++++++++++++++
 1 file changed, 701 insertions(+)
 create mode 100644 docs/plans/2026-02-21-skill-writer.md

diff --git a/docs/plans/2026-02-21-skill-writer.md b/docs/plans/2026-02-21-skill-writer.md
new file mode 100644
index 0000000..d269e5e
--- /dev/null
+++ b/docs/plans/2026-02-21-skill-writer.md
@@ -0,0 +1,701 @@
+# Skill Writer Implementation Plan
+
+> **For Claude:** REQUIRED SUB-SKILL: Use superpowers:executing-plans to implement this plan task-by-task.
+
+**Goal:** Let the RustFox agent write multi-file skill directories and hot-reload them instantly — no bot restart required.
+
+**Architecture:** Wrap `SkillRegistry` in `tokio::sync::RwLock` so `reload_skills` can swap it at runtime. Add `write_skill_file` + `reload_skills` as built-in tools in `agent.rs`. Rebuild the system prompt from the live registry on every `process_message` call so new skills take effect immediately in the same conversation.
+
+**Tech Stack:** Rust 2021, Tokio async runtime, `anyhow`, `serde_json`, `tracing`
+
+---
+
+## Task 1: Add validation helpers + tests (TDD — RED then GREEN)
+
+**Files:**
+- Modify: `src/agent.rs`
+
+### Step 1: Write failing tests
+
+At the bottom of `src/agent.rs`, inside the existing `#[cfg(test)] mod tests` block, add:
+
+```rust
+    #[test]
+    fn test_validate_skill_name_valid() {
+        assert!(validate_skill_name("creating-skills").is_ok());
+        assert!(validate_skill_name("my-skill-123").is_ok());
+        assert!(validate_skill_name("a").is_ok());
+    }
+
+    #[test]
+    fn test_validate_skill_name_empty() {
+        assert!(validate_skill_name("").is_err());
+    }
+
+    #[test]
+    fn test_validate_skill_name_too_long() {
+        let long = "a".repeat(65);
+        assert!(validate_skill_name(&long).is_err());
+    }
+
+    #[test]
+    fn test_validate_skill_name_invalid_chars() {
+        assert!(validate_skill_name("My-Skill").is_err());  // uppercase
+        assert!(validate_skill_name("my skill").is_err()); // space
+        assert!(validate_skill_name("my_skill").is_err()); // underscore
+        assert!(validate_skill_name("my/skill").is_err()); // slash
+    }
+
+    #[test]
+    fn test_validate_skill_path_valid() {
+        assert!(validate_skill_path("SKILL.md").is_ok());
+        assert!(validate_skill_path("reference.md").is_ok());
+        assert!(validate_skill_path("scripts/helper.py").is_ok());
+        assert!(validate_skill_path("scripts/sub/tool.sh").is_ok());
+    }
+
+    #[test]
+    fn test_validate_skill_path_traversal() {
+        assert!(validate_skill_path("../other-skill/SKILL.md").is_err());
+        assert!(validate_skill_path("scripts/../../../etc/passwd").is_err());
+        assert!(validate_skill_path("..").is_err());
+    }
+
+    #[test]
+    fn test_validate_skill_path_empty() {
+        assert!(validate_skill_path("").is_err());
+    }
+```
+
+### Step 2: Run tests — expect compile failure (functions don't exist yet)
+
+```bash
+cargo test -p rustfox 2>&1 | head -30
+```
+
+Expected: `error[E0425]: cannot find function 'validate_skill_name'`
+
+### Step 3: Add the validation functions
+
+Just above the `#[cfg(test)]` block (at module level, after the `split_response_chunks` function), add:
+
+```rust
+/// Validate skill directory name: lowercase letters, numbers, hyphens, 1–64 chars.
+fn validate_skill_name(name: &str) -> Result<(), String> {
+    if name.is_empty() {
+        return Err("Skill name must not be empty".to_string());
+    }
+    if name.len() > 64 {
+        return Err(format!("Skill name too long ({} chars, max 64)", name.len()));
+    }
+    if !name
+        .chars()
+        .all(|c| c.is_ascii_lowercase() || c.is_ascii_digit() || c == '-')
+    {
+        return Err(
+            "Skill name must contain only lowercase letters, numbers, and hyphens".to_string(),
+        );
+    }
+    Ok(())
+}
+
+/// Validate a relative path within a skill directory: no '..' components, non-empty.
+fn validate_skill_path(path: &str) -> Result<(), String> {
+    if path.is_empty() {
+        return Err("Relative path must not be empty".to_string());
+    }
+    if path.split('/').any(|c| c == "..") {
+        return Err("Path traversal ('..') is not allowed".to_string());
+    }
+    Ok(())
+}
+```
+
+### Step 4: Run tests — expect GREEN
+
+```bash
+cargo test -p rustfox 2>&1 | tail -20
+```
+
+Expected: all new tests pass.
+
+### Step 5: Commit
+
+```bash
+git add src/agent.rs
+git commit -m "feat: add skill_name and skill_path validation helpers with tests"
+```
+
+---
+
+## Task 2: Wrap SkillRegistry in RwLock and make build_system_prompt async
+
+**Files:**
+- Modify: `src/agent.rs`
+
+### Step 1: Change the `skills` field type
+
+In the `Agent` struct (around line 33), change:
+
+```rust
+// BEFORE
+pub skills: SkillRegistry,
+
+// AFTER
+pub skills: tokio::sync::RwLock<SkillRegistry>,
+```
+
+### Step 2: Update `Agent::new` to wrap in RwLock
+
+In `Agent::new`, in the `Self { ... }` block (around line 58), change:
+
+```rust
+// BEFORE
+            skills,
+
+// AFTER
+            skills: tokio::sync::RwLock::new(skills),
+```
+
+### Step 3: Make `build_system_prompt` async and acquire read lock
+
+Replace the entire `build_system_prompt` function (currently around line 73–92):
+
+```rust
+/// Build the system prompt, incorporating loaded skills
+async fn build_system_prompt(&self) -> String {
+    let mut prompt = self.config.openrouter.system_prompt.clone();
+
+    let skills = self.skills.read().await;
+    let skill_context = skills.build_context();
+    if !skill_context.is_empty() {
+        prompt.push_str("\n\n# Available Skills\n\n");
+        prompt.push_str(&skill_context);
+    }
+    drop(skills); // release read lock before further work
+
+    // Append current timestamp and optional location
+    let now = chrono::Utc::now()
+        .format("%Y-%m-%d %H:%M:%S UTC")
+        .to_string();
+    prompt.push_str(&format!("\n\nCurrent date and time: {}", now));
+    if let Some(loc) = self.config.user_location() {
+        prompt.push_str(&format!("\nUser location: {}", loc));
+    }
+
+    prompt
+}
+```
+
+### Step 4: Verify the project compiles
+
+```bash
+cargo check 2>&1
+```
+
+Expected: no errors. (The call site in `process_message` will be updated in the next step.)
+
+### Step 5: Commit
+
+```bash
+git add src/agent.rs
+git commit -m "feat: wrap SkillRegistry in RwLock, make build_system_prompt async"
+```
+
+---
+
+## Task 3: Always-fresh system prompt in `process_message`
+
+**Files:**
+- Modify: `src/agent.rs`
+
+### Step 1: Replace the system-prompt block in `process_message`
+
+Find this block (around line 110–121):
+
+```rust
+        // If no messages yet, add system prompt
+        if messages.is_empty() {
+            let system_msg = ChatMessage {
+                role: "system".to_string(),
+                content: Some(self.build_system_prompt()),
+                tool_calls: None,
+                tool_call_id: None,
+            };
+            self.memory
+                .save_message(&conversation_id, &system_msg)
+                .await?;
+            messages.push(system_msg);
+        }
+```
+
+Replace it with:
+
+```rust
+        // Always build the system prompt from the live registry.
+        // For new conversations: save to DB and push.
+        // For existing conversations: refresh messages[0] in-memory only
+        //   (DB keeps the historical system message intact).
+        let current_system_prompt = self.build_system_prompt().await;
+        if messages.is_empty() {
+            let system_msg = ChatMessage {
+                role: "system".to_string(),
+                content: Some(current_system_prompt),
+                tool_calls: None,
+                tool_call_id: None,
+            };
+            self.memory
+                .save_message(&conversation_id, &system_msg)
+                .await?;
+            messages.push(system_msg);
+        } else {
+            // Refresh in-memory: new skills loaded by reload_skills take effect
+            // on the very next message without restarting the bot.
+            messages[0].content = Some(current_system_prompt);
+        }
+```
+
+### Step 2: Verify compilation
+
+```bash
+cargo check 2>&1
+```
+
+Expected: no errors.
+
+### Step 3: Run existing tests
+
+```bash
+cargo test 2>&1
+```
+
+Expected: all existing tests pass.
+
+### Step 4: Commit
+
+```bash
+git add src/agent.rs
+git commit -m "feat: always rebuild system prompt from live registry on each process_message"
+```
+
+---
+
+## Task 4: Add skill tool definitions
+
+**Files:**
+- Modify: `src/agent.rs`
+
+### Step 1: Add `skill_tool_definitions()` method
+
+Add this method to the `impl Agent` block, right after `scheduling_tool_definitions()` (before `execute_tool`):
+
+```rust
+    /// Skill management tool definitions exposed to the LLM
+    fn skill_tool_definitions(&self) -> Vec<ToolDefinition> {
+        use serde_json::json;
+
+        vec![
+            ToolDefinition {
+                tool_type: "function".to_string(),
+                function: FunctionDefinition {
+                    name: "write_skill_file".to_string(),
+                    description: concat!(
+                        "Write a file into a skill directory under the configured skills folder. ",
+                        "Use this to create SKILL.md and any supporting files (reference docs, templates, scripts). ",
+                        "Call reload_skills after ALL files for the skill are written."
+                    ).to_string(),
+                    parameters: json!({
+                        "type": "object",
+                        "properties": {
+                            "skill_name": {
+                                "type": "string",
+                                "description": "Skill directory name: lowercase letters, numbers, hyphens only, max 64 chars (e.g. 'creating-reports')"
+                            },
+                            "relative_path": {
+                                "type": "string",
+                                "description": "Path within the skill directory, e.g. 'SKILL.md', 'reference.md', 'scripts/helper.py'"
+                            },
+                            "content": {
+                                "type": "string",
+                                "description": "Full file content to write"
+                            }
+                        },
+                        "required": ["skill_name", "relative_path", "content"]
+                    }),
+                },
+            },
+            ToolDefinition {
+                tool_type: "function".to_string(),
+                function: FunctionDefinition {
+                    name: "reload_skills".to_string(),
+                    description: concat!(
+                        "Reload all skills from the skills directory into memory. ",
+                        "Call this after writing skill files to make the new skill immediately active ",
+                        "without restarting the bot."
+                    ).to_string(),
+                    parameters: json!({ "type": "object", "properties": {} }),
+                },
+            },
+        ]
+    }
+```
+
+### Step 2: Add to `all_tool_definitions()`
+
+In `all_tool_definitions()` (around line 324), add:
+
+```rust
+// BEFORE (last line of the method):
+        all_tools
+// AFTER:
+        all_tools.extend(self.skill_tool_definitions());
+        all_tools
+```
+
+### Step 3: Add to the agentic loop's tool list in `process_message`
+
+In `process_message`, find the block that builds `all_tools` (around line 136–139):
+
+```rust
+        // Gather all tool definitions
+        let mut all_tools: Vec<ToolDefinition> = tools::builtin_tool_definitions();
+        all_tools.extend(self.mcp.tool_definitions());
+        all_tools.extend(self.memory_tool_definitions());
+        all_tools.extend(self.scheduling_tool_definitions());
+```
+
+Add one line after the last `extend`:
+
+```rust
+        all_tools.extend(self.skill_tool_definitions());
+```
+
+### Step 4: Verify compilation
+
+```bash
+cargo check 2>&1
+```
+
+Expected: no errors.
+
+### Step 5: Commit
+
+```bash
+git add src/agent.rs
+git commit -m "feat: add write_skill_file and reload_skills tool definitions"
+```
+
+---
+
+## Task 5: Handle write_skill_file and reload_skills in execute_tool
+
+**Files:**
+- Modify: `src/agent.rs`
+
+### Step 1: Add handlers in `execute_tool`
+
+In `execute_tool`, find the arm:
+
+```rust
+            _ if self.mcp.is_mcp_tool(name) => match self.mcp.call_tool(name, arguments).await {
+```
+
+Insert the two new arms **immediately before** that line:
+
+```rust
+            "write_skill_file" => {
+                let skill_name = match arguments["skill_name"].as_str() {
+                    Some(n) => n.to_string(),
+                    None => return "Missing skill_name".to_string(),
+                };
+                let relative_path = match arguments["relative_path"].as_str() {
+                    Some(p) => p.to_string(),
+                    None => return "Missing relative_path".to_string(),
+                };
+                let content = arguments["content"].as_str().unwrap_or("").to_string();
+
+                if let Err(e) = validate_skill_name(&skill_name) {
+                    return format!("Invalid skill_name: {}", e);
+                }
+                if let Err(e) = validate_skill_path(&relative_path) {
+                    return format!("Invalid relative_path: {}", e);
+                }
+
+                let target = self
+                    .config
+                    .skills
+                    .directory
+                    .join(&skill_name)
+                    .join(&relative_path);
+
+                if let Some(parent) = target.parent() {
+                    if let Err(e) = tokio::fs::create_dir_all(parent).await {
+                        return format!("Failed to create directories: {}", e);
+                    }
+                }
+
+                match tokio::fs::write(&target, &content).await {
+                    Ok(()) => {
+                        info!("Skill file written: {}", target.display());
+                        format!("Written: {}", target.display())
+                    }
+                    Err(e) => format!("Failed to write skill file: {}", e),
+                }
+            }
+            "reload_skills" => {
+                use crate::skills::loader::load_skills_from_dir;
+                match load_skills_from_dir(&self.config.skills.directory).await {
+                    Ok(new_registry) => {
+                        let count = new_registry.len();
+                        let mut skills = self.skills.write().await;
+                        *skills = new_registry;
+                        info!("Skills reloaded: {} skill(s) active", count);
+                        format!("Skills reloaded. {} skill(s) now active.", count)
+                    }
+                    Err(e) => format!("Failed to reload skills: {}", e),
+                }
+            }
+```
+
+### Step 2: Verify compilation
+
+```bash
+cargo check 2>&1
+```
+
+Expected: no errors.
+
+### Step 3: Run all tests
+
+```bash
+cargo test 2>&1
+```
+
+Expected: all tests pass (including the validation tests from Task 1).
+
+### Step 4: Commit
+
+```bash
+git add src/agent.rs
+git commit -m "feat: handle write_skill_file and reload_skills in execute_tool"
+```
+
+---
+
+## Task 6: Create skills/creating-skills/SKILL.md
+
+**Files:**
+- Create: `skills/creating-skills/SKILL.md`
+
+### Step 1: Create the directory
+
+```bash
+mkdir -p skills/creating-skills
+```
+
+### Step 2: Create the skill file
+
+Create `skills/creating-skills/SKILL.md` with this exact content:
+
+````markdown
+---
+name: creating-skills
+description: Use when the user asks to create, add, or write a new bot skill, or wants to teach the bot a new behavior, capability, or workflow.
+tags: [skills, meta]
+---
+
+# Creating Skills
+
+Writes new bot skills as properly-formatted multi-file directories in `skills/` and activates them immediately without restarting the bot.
+
+## When to Use
+
+- "Create a skill for X"
+- "Teach the bot to Y"
+- "Add a skill that does Z"
+- "Write a skill for [topic]"
+
+## Process
+
+### 1. Gather Requirements
+
+Ask the user (one question at a time if unclear):
+- **Name**: Slug for the skill directory — lowercase letters, numbers, hyphens, e.g. `processing-reports`
+- **Trigger**: When should this activate? (becomes the `description` field's "Use when...")
+- **Behavior**: What should the agent do step-by-step?
+- **Files**: Does it need supporting files (reference docs, templates, scripts)?
+
+### 2. Design the Structure
+
+Plan the directory before writing:
+
+```
+skills/<name>/
+├── SKILL.md           # Always required — main entry point
+├── reference.md       # Optional: heavy reference content (100+ lines)
+├── examples.md        # Optional: input/output examples
+└── scripts/           # Optional: utility scripts
+    └── helper.py
+```
+
+Rules from official best practices:
+- References must be **one level deep** from SKILL.md — no chained references
+- Split into separate files only when SKILL.md would exceed ~500 lines
+- SKILL.md body should be concise — it loads into context on every trigger
+
+### 3. Write SKILL.md
+
+SKILL.md must follow this format:
+
+```markdown
+---
+name: skill-name-with-hyphens
+description: Use when [specific triggering conditions — third person, no workflow summary]
+tags: [optional, tags]
+---
+
+# Skill Title
+
+Brief overview (1-2 sentences).
+
+## When to Use
+
+- Trigger condition 1
+- Trigger condition 2
+
+## [Core Instructions]
+
+[Clear, action-oriented, imperative instructions]
+
+## Supporting Files (if any)
+
+**Topic A**: See [reference.md](reference.md)
+**Topic B**: See [examples.md](examples.md)
+```
+
+**Frontmatter rules:**
+- `name`: lowercase letters, numbers, hyphens only; max 64 chars; avoid "anthropic" / "claude"
+- `description`: starts with "Use when..."; third person; no workflow summary; max 1024 chars
+- `tags`: optional list
+
+**Body rules:**
+- Under 500 lines total
+- Action-oriented and imperative
+- Consistent terminology throughout
+- No time-sensitive information
+
+### 4. Write Files
+
+Call `write_skill_file` once per file. Always write `SKILL.md` first:
+
+```
+write_skill_file(skill_name="my-skill", relative_path="SKILL.md", content="---\nname: ...")
+write_skill_file(skill_name="my-skill", relative_path="reference.md", content="# Reference\n...")
+```
+
+### 5. Activate
+
+Call `reload_skills` immediately after all files are written.
+
+Tell the user:
+- The skill is now live (no restart needed)
+- Which files were created
+- What trigger phrase activates it
+
+## Description Writing Guide
+
+```yaml
+# ✅ Good — triggering conditions only, third person
+description: Use when the user asks to generate weekly reports, export data summaries, or create formatted output from raw data.
+
+# ✅ Good — specific triggers
+description: Use when analyzing code for bugs, reviewing pull requests, or the user asks for a code review.
+
+# ❌ Bad — summarizes workflow (causes Claude to skip reading the skill body)
+description: Use when creating reports — reads data, formats it, writes to file.
+
+# ❌ Bad — first person
+description: I help users create reports from their data.
+```
+````
+
+### Step 3: Verify the skill loads
+
+```bash
+cargo check 2>&1
+```
+
+The skill is a plain file — no compilation needed. The bot will load it at startup.
+
+### Step 4: Commit
+
+```bash
+git add skills/creating-skills/SKILL.md
+git commit -m "feat: add creating-skills skill for agent self-authoring"
+```
+
+---
+
+## Task 7: Lint, format, and push
+
+**Files:** none (verification only)
+
+### Step 1: Format
+
+```bash
+cargo fmt
+```
+
+Expected: no output (or only whitespace changes).
+
+### Step 2: Clippy
+
+```bash
+cargo clippy -- -D warnings 2>&1
+```
+
+Expected: no warnings. If any warnings appear, fix them before continuing.
+
+Common clippy issues to watch for:
+- `dead_code` on `validate_skill_name` / `validate_skill_path` (they're used in `execute_tool`, so should be fine)
+- If `validate_skill_name` is only used in tests + execute_tool, clippy may flag it — suppress with `#[allow(dead_code)]` only if needed
+
+### Step 3: Run all tests
+
+```bash
+cargo test 2>&1
+```
+
+Expected: all tests pass.
+
+### Step 4: Commit any fmt changes
+
+```bash
+git add -u
+git diff --cached --quiet || git commit -m "style: cargo fmt"
+```
+
+### Step 5: Push branch
+
+```bash
+git push -u origin claude/agent-skill-writer-SJS5d
+```
+
+Expected: push succeeds. If network failure, retry with exponential backoff (2s, 4s, 8s, 16s).
+
+---
+
+## Verification Checklist
+
+After all tasks complete:
+- [ ] `cargo check` passes with no errors
+- [ ] `cargo clippy -- -D warnings` passes with no warnings
+- [ ] `cargo fmt --check` passes
+- [ ] `cargo test` passes (all tests including the new validation tests)
+- [ ] `skills/creating-skills/SKILL.md` exists and has valid YAML frontmatter
+- [ ] `src/agent.rs` has `skills: tokio::sync::RwLock<SkillRegistry>`
+- [ ] `src/agent.rs` has `build_system_prompt` as `async fn`
+- [ ] `process_message` refreshes `messages[0]` for existing conversations
+- [ ] `write_skill_file` and `reload_skills` are handled in `execute_tool`
+- [ ] Both tools appear in `all_tool_definitions()` and the agentic loop
+- [ ] Branch pushed to `claude/agent-skill-writer-SJS5d`

From 98e9705f1e0ddcae8964ca548c63785a79388b94 Mon Sep 17 00:00:00 2001
From: Claude <noreply@anthropic.com>
Date: Sat, 21 Feb 2026 13:57:45 +0000
Subject: [PATCH 03/15] feat: add skill_name and skill_path validation helpers
 with tests

---
 src/agent.rs | 76 ++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 76 insertions(+)

diff --git a/src/agent.rs b/src/agent.rs
index 1e9de58..28c1279 100644
--- a/src/agent.rs
+++ b/src/agent.rs
@@ -766,6 +766,36 @@ pub fn split_response_chunks(text: &str, max_len: usize) -> Vec<String> {
     chunks
 }
 
+/// Validate skill directory name: lowercase letters, numbers, hyphens, 1–64 chars.
+fn validate_skill_name(name: &str) -> Result<(), String> {
+    if name.is_empty() {
+        return Err("Skill name must not be empty".to_string());
+    }
+    if name.len() > 64 {
+        return Err(format!("Skill name too long ({} chars, max 64)", name.len()));
+    }
+    if !name
+        .chars()
+        .all(|c| c.is_ascii_lowercase() || c.is_ascii_digit() || c == '-')
+    {
+        return Err(
+            "Skill name must contain only lowercase letters, numbers, and hyphens".to_string(),
+        );
+    }
+    Ok(())
+}
+
+/// Validate a relative path within a skill directory: no '..' components, non-empty.
+fn validate_skill_path(path: &str) -> Result<(), String> {
+    if path.is_empty() {
+        return Err("Relative path must not be empty".to_string());
+    }
+    if path.split('/').any(|c| c == "..") {
+        return Err("Path traversal ('..') is not allowed".to_string());
+    }
+    Ok(())
+}
+
 #[cfg(test)]
 mod tests {
     use super::*;
@@ -800,4 +830,50 @@ mod tests {
         assert!(validate_cron_expr("0 9 * * *").is_err()); // 5 fields
         assert!(validate_cron_expr("0 0 9 1 * * MON").is_err()); // 7 fields
     }
+
+    #[test]
+    fn test_validate_skill_name_valid() {
+        assert!(validate_skill_name("creating-skills").is_ok());
+        assert!(validate_skill_name("my-skill-123").is_ok());
+        assert!(validate_skill_name("a").is_ok());
+    }
+
+    #[test]
+    fn test_validate_skill_name_empty() {
+        assert!(validate_skill_name("").is_err());
+    }
+
+    #[test]
+    fn test_validate_skill_name_too_long() {
+        let long = "a".repeat(65);
+        assert!(validate_skill_name(&long).is_err());
+    }
+
+    #[test]
+    fn test_validate_skill_name_invalid_chars() {
+        assert!(validate_skill_name("My-Skill").is_err());  // uppercase
+        assert!(validate_skill_name("my skill").is_err()); // space
+        assert!(validate_skill_name("my_skill").is_err()); // underscore
+        assert!(validate_skill_name("my/skill").is_err()); // slash
+    }
+
+    #[test]
+    fn test_validate_skill_path_valid() {
+        assert!(validate_skill_path("SKILL.md").is_ok());
+        assert!(validate_skill_path("reference.md").is_ok());
+        assert!(validate_skill_path("scripts/helper.py").is_ok());
+        assert!(validate_skill_path("scripts/sub/tool.sh").is_ok());
+    }
+
+    #[test]
+    fn test_validate_skill_path_traversal() {
+        assert!(validate_skill_path("../other-skill/SKILL.md").is_err());
+        assert!(validate_skill_path("scripts/../../../etc/passwd").is_err());
+        assert!(validate_skill_path("..").is_err());
+    }
+
+    #[test]
+    fn test_validate_skill_path_empty() {
+        assert!(validate_skill_path("").is_err());
+    }
 }

From 8ac260cece65d165ca54e62db43dc5a0f85e1997 Mon Sep 17 00:00:00 2001
From: Claude <noreply@anthropic.com>
Date: Sat, 21 Feb 2026 14:01:59 +0000
Subject: [PATCH 04/15] fix: suppress dead_code for validation helpers, reject
 absolute paths in validate_skill_path

https://claude.ai/code/session_01V5qMEXBhQQuKHeot52gxEh
---
 src/agent.rs | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/src/agent.rs b/src/agent.rs
index 28c1279..a12a315 100644
--- a/src/agent.rs
+++ b/src/agent.rs
@@ -767,6 +767,7 @@ pub fn split_response_chunks(text: &str, max_len: usize) -> Vec<String> {
 }
 
 /// Validate skill directory name: lowercase letters, numbers, hyphens, 1–64 chars.
+#[allow(dead_code)]
 fn validate_skill_name(name: &str) -> Result<(), String> {
     if name.is_empty() {
         return Err("Skill name must not be empty".to_string());
@@ -786,10 +787,14 @@ fn validate_skill_name(name: &str) -> Result<(), String> {
 }
 
 /// Validate a relative path within a skill directory: no '..' components, non-empty.
+#[allow(dead_code)]
 fn validate_skill_path(path: &str) -> Result<(), String> {
     if path.is_empty() {
         return Err("Relative path must not be empty".to_string());
     }
+    if path.starts_with('/') {
+        return Err("Relative path must not be absolute".to_string());
+    }
     if path.split('/').any(|c| c == "..") {
         return Err("Path traversal ('..') is not allowed".to_string());
     }
@@ -876,4 +881,10 @@ mod tests {
     fn test_validate_skill_path_empty() {
         assert!(validate_skill_path("").is_err());
     }
+
+    #[test]
+    fn test_validate_skill_path_absolute() {
+        assert!(validate_skill_path("/etc/passwd").is_err());
+        assert!(validate_skill_path("/SKILL.md").is_err());
+    }
 }

From fbf416cebc5e13100380552e1125d15379ad6815 Mon Sep 17 00:00:00 2001
From: Claude <noreply@anthropic.com>
Date: Sat, 21 Feb 2026 14:06:19 +0000
Subject: [PATCH 05/15] feat: wrap SkillRegistry in RwLock, make
 build_system_prompt async

https://claude.ai/code/session_01V5qMEXBhQQuKHeot52gxEh
---
 src/agent.rs             | 10 ++++++----
 src/platform/telegram.rs |  2 +-
 2 files changed, 7 insertions(+), 5 deletions(-)

diff --git a/src/agent.rs b/src/agent.rs
index a12a315..9da35ab 100644
--- a/src/agent.rs
+++ b/src/agent.rs
@@ -30,7 +30,7 @@ pub struct Agent {
     pub config: Config,
     pub mcp: McpManager,
     pub memory: MemoryStore,
-    pub skills: SkillRegistry,
+    pub skills: tokio::sync::RwLock<SkillRegistry>,
     // Fields used by scheduling / job closures
     pub task_store: ScheduledTaskStore,
     pub scheduler: Arc<Scheduler>,
@@ -60,7 +60,7 @@ impl Agent {
             config,
             mcp,
             memory,
-            skills,
+            skills: tokio::sync::RwLock::new(skills),
             task_store,
             scheduler,
             bot,
@@ -70,14 +70,16 @@ impl Agent {
     }
 
     /// Build the system prompt, incorporating loaded skills
-    fn build_system_prompt(&self) -> String {
+    async fn build_system_prompt(&self) -> String {
         let mut prompt = self.config.openrouter.system_prompt.clone();
 
-        let skill_context = self.skills.build_context();
+        let skills = self.skills.read().await;
+        let skill_context = skills.build_context();
         if !skill_context.is_empty() {
             prompt.push_str("\n\n# Available Skills\n\n");
             prompt.push_str(&skill_context);
         }
+        drop(skills); // release read lock before further work
 
         // Append current timestamp and optional location
         let now = chrono::Utc::now()
diff --git a/src/platform/telegram.rs b/src/platform/telegram.rs
index ecf5377..642fc2e 100644
--- a/src/platform/telegram.rs
+++ b/src/platform/telegram.rs
@@ -128,7 +128,7 @@ async fn handle_message(bot: Bot, msg: Message, agent: Arc<Agent>) -> ResponseRe
     }
 
     if text == "/skills" {
-        let skills = agent.skills.list();
+        let skills = agent.skills.read().await.list();
         if skills.is_empty() {
             bot.send_message(msg.chat.id, "No skills loaded.").await?;
         } else {

From 3d255b207dd25a7c96e870cdf951f836fba613e4 Mon Sep 17 00:00:00 2001
From: Claude <noreply@anthropic.com>
Date: Sat, 21 Feb 2026 14:06:55 +0000
Subject: [PATCH 06/15] feat: wrap SkillRegistry in RwLock, make
 build_system_prompt async

Also fix temporary borrow in telegram.rs /skills handler caused by the
new RwLock wrapper requiring an explicit guard binding before calling list().

https://claude.ai/code/session_01V5qMEXBhQQuKHeot52gxEh
---
 src/platform/telegram.rs | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/platform/telegram.rs b/src/platform/telegram.rs
index 642fc2e..ef5028a 100644
--- a/src/platform/telegram.rs
+++ b/src/platform/telegram.rs
@@ -128,7 +128,8 @@ async fn handle_message(bot: Bot, msg: Message, agent: Arc<Agent>) -> ResponseRe
     }
 
     if text == "/skills" {
-        let skills = agent.skills.read().await.list();
+        let skills_guard = agent.skills.read().await;
+        let skills = skills_guard.list();
         if skills.is_empty() {
             bot.send_message(msg.chat.id, "No skills loaded.").await?;
         } else {

From cd1e0bf553b524fe81ade3e47f5d516ada10d049 Mon Sep 17 00:00:00 2001
From: Claude <noreply@anthropic.com>
Date: Sat, 21 Feb 2026 14:09:56 +0000
Subject: [PATCH 07/15] feat: always rebuild system prompt from live registry
 on each process_message

https://claude.ai/code/session_01V5qMEXBhQQuKHeot52gxEh
---
 src/agent.rs | 12 ++++++++++--
 1 file changed, 10 insertions(+), 2 deletions(-)

diff --git a/src/agent.rs b/src/agent.rs
index 9da35ab..ee5010c 100644
--- a/src/agent.rs
+++ b/src/agent.rs
@@ -108,11 +108,15 @@ impl Agent {
         // Load existing messages from memory
         let mut messages = self.memory.load_messages(&conversation_id).await?;
 
-        // If no messages yet, add system prompt
+        // Always build the system prompt from the live registry.
+        // For new conversations: save to DB and push.
+        // For existing conversations: refresh messages[0] in-memory only
+        //   (DB keeps the historical system message intact).
+        let current_system_prompt = self.build_system_prompt().await;
         if messages.is_empty() {
             let system_msg = ChatMessage {
                 role: "system".to_string(),
-                content: Some(self.build_system_prompt()),
+                content: Some(current_system_prompt),
                 tool_calls: None,
                 tool_call_id: None,
             };
@@ -120,6 +124,10 @@ impl Agent {
                 .save_message(&conversation_id, &system_msg)
                 .await?;
             messages.push(system_msg);
+        } else {
+            // Refresh in-memory: new skills loaded by reload_skills take effect
+            // on the very next message without restarting the bot.
+            messages[0].content = Some(current_system_prompt);
         }
 
         // Add user message

From 5ba840aa9dac31c3e7b6fd685d4fec8c6c85a9d5 Mon Sep 17 00:00:00 2001
From: Claude <noreply@anthropic.com>
Date: Sat, 21 Feb 2026 14:13:18 +0000
Subject: [PATCH 08/15] fix: find system message by role before refreshing
 prompt, not by index

https://claude.ai/code/session_01V5qMEXBhQQuKHeot52gxEh
---
 src/agent.rs | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/src/agent.rs b/src/agent.rs
index ee5010c..7c284c6 100644
--- a/src/agent.rs
+++ b/src/agent.rs
@@ -127,7 +127,10 @@ impl Agent {
         } else {
             // Refresh in-memory: new skills loaded by reload_skills take effect
             // on the very next message without restarting the bot.
-            messages[0].content = Some(current_system_prompt);
+            // Find the system message by role (defensive: don't assume messages[0] is system).
+            if let Some(system_msg) = messages.iter_mut().find(|m| m.role == "system") {
+                system_msg.content = Some(current_system_prompt);
+            }
         }
 
         // Add user message

From 6ccc049f249e8028a1493ee3791728e9847b9515 Mon Sep 17 00:00:00 2001
From: Claude <noreply@anthropic.com>
Date: Sat, 21 Feb 2026 14:16:37 +0000
Subject: [PATCH 09/15] feat: add write_skill_file and reload_skills tool
 definitions

---
 src/agent.rs | 52 ++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 52 insertions(+)

diff --git a/src/agent.rs b/src/agent.rs
index 7c284c6..db7265a 100644
--- a/src/agent.rs
+++ b/src/agent.rs
@@ -150,6 +150,7 @@ impl Agent {
         all_tools.extend(self.mcp.tool_definitions());
         all_tools.extend(self.memory_tool_definitions());
         all_tools.extend(self.scheduling_tool_definitions());
+        all_tools.extend(self.skill_tool_definitions());
 
         // Agentic loop — keep calling LLM until we get a non-tool response
         let max_iterations = self.config.max_iterations();
@@ -339,6 +340,7 @@ impl Agent {
         all_tools.extend(self.mcp.tool_definitions());
         all_tools.extend(self.memory_tool_definitions());
         all_tools.extend(self.scheduling_tool_definitions());
+        all_tools.extend(self.skill_tool_definitions());
         all_tools
     }
 
@@ -460,6 +462,56 @@ impl Agent {
     }
 
     /// Execute a tool call by routing to the right handler
+
+    /// Skill management tool definitions exposed to the LLM
+    fn skill_tool_definitions(&self) -> Vec<ToolDefinition> {
+        use serde_json::json;
+
+        vec![
+            ToolDefinition {
+                tool_type: "function".to_string(),
+                function: FunctionDefinition {
+                    name: "write_skill_file".to_string(),
+                    description: concat!(
+                        "Write a file into a skill directory under the configured skills folder. ",
+                        "Use this to create SKILL.md and any supporting files (reference docs, templates, scripts). ",
+                        "Call reload_skills after ALL files for the skill are written."
+                    ).to_string(),
+                    parameters: json!({
+                        "type": "object",
+                        "properties": {
+                            "skill_name": {
+                                "type": "string",
+                                "description": "Skill directory name: lowercase letters, numbers, hyphens only, max 64 chars (e.g. 'creating-reports')"
+                            },
+                            "relative_path": {
+                                "type": "string",
+                                "description": "Path within the skill directory, e.g. 'SKILL.md', 'reference.md', 'scripts/helper.py'"
+                            },
+                            "content": {
+                                "type": "string",
+                                "description": "Full file content to write"
+                            }
+                        },
+                        "required": ["skill_name", "relative_path", "content"]
+                    }),
+                },
+            },
+            ToolDefinition {
+                tool_type: "function".to_string(),
+                function: FunctionDefinition {
+                    name: "reload_skills".to_string(),
+                    description: concat!(
+                        "Reload all skills from the skills directory into memory. ",
+                        "Call this after writing skill files to make the new skill immediately active ",
+                        "without restarting the bot."
+                    ).to_string(),
+                    parameters: json!({ "type": "object", "properties": {} }),
+                },
+            },
+        ]
+    }
+
     async fn execute_tool(
         &self,
         name: &str,

From 07f85df394a62a0b4b3d0b417fb1bf07963051a2 Mon Sep 17 00:00:00 2001
From: Claude <noreply@anthropic.com>
Date: Sat, 21 Feb 2026 14:20:32 +0000
Subject: [PATCH 10/15] fix: move skill_tool_definitions before execute_tool to
 fix clippy doc comment lint

https://claude.ai/code/session_01V5qMEXBhQQuKHeot52gxEh
---
 src/agent.rs | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/src/agent.rs b/src/agent.rs
index db7265a..02c6eaf 100644
--- a/src/agent.rs
+++ b/src/agent.rs
@@ -461,8 +461,6 @@ impl Agent {
         ]
     }
 
-    /// Execute a tool call by routing to the right handler
-
     /// Skill management tool definitions exposed to the LLM
     fn skill_tool_definitions(&self) -> Vec<ToolDefinition> {
         use serde_json::json;
@@ -512,6 +510,7 @@ impl Agent {
         ]
     }
 
+    /// Execute a tool call by routing to the right handler
     async fn execute_tool(
         &self,
         name: &str,

From cf1bcb2366dc52c306d99165b06b46ef0e16db1e Mon Sep 17 00:00:00 2001
From: Claude <noreply@anthropic.com>
Date: Sat, 21 Feb 2026 14:23:23 +0000
Subject: [PATCH 11/15] feat: handle write_skill_file and reload_skills in
 execute_tool

https://claude.ai/code/session_01V5qMEXBhQQuKHeot52gxEh
---
 src/agent.rs | 54 ++++++++++++++++++++++++++++++++++++++++++++++++++--
 1 file changed, 52 insertions(+), 2 deletions(-)

diff --git a/src/agent.rs b/src/agent.rs
index 02c6eaf..b76ac39 100644
--- a/src/agent.rs
+++ b/src/agent.rs
@@ -745,6 +745,58 @@ impl Agent {
                     Err(e) => format!("Failed to update task status: {}", e),
                 }
             }
+            "write_skill_file" => {
+                let skill_name = match arguments["skill_name"].as_str() {
+                    Some(n) => n.to_string(),
+                    None => return "Missing skill_name".to_string(),
+                };
+                let relative_path = match arguments["relative_path"].as_str() {
+                    Some(p) => p.to_string(),
+                    None => return "Missing relative_path".to_string(),
+                };
+                let content = arguments["content"].as_str().unwrap_or("").to_string();
+
+                if let Err(e) = validate_skill_name(&skill_name) {
+                    return format!("Invalid skill_name: {}", e);
+                }
+                if let Err(e) = validate_skill_path(&relative_path) {
+                    return format!("Invalid relative_path: {}", e);
+                }
+
+                let target = self
+                    .config
+                    .skills
+                    .directory
+                    .join(&skill_name)
+                    .join(&relative_path);
+
+                if let Some(parent) = target.parent() {
+                    if let Err(e) = tokio::fs::create_dir_all(parent).await {
+                        return format!("Failed to create directories: {}", e);
+                    }
+                }
+
+                match tokio::fs::write(&target, &content).await {
+                    Ok(()) => {
+                        info!("Skill file written: {}", target.display());
+                        format!("Written: {}", target.display())
+                    }
+                    Err(e) => format!("Failed to write skill file: {}", e),
+                }
+            }
+            "reload_skills" => {
+                use crate::skills::loader::load_skills_from_dir;
+                match load_skills_from_dir(&self.config.skills.directory).await {
+                    Ok(new_registry) => {
+                        let count = new_registry.len();
+                        let mut skills = self.skills.write().await;
+                        *skills = new_registry;
+                        info!("Skills reloaded: {} skill(s) active", count);
+                        format!("Skills reloaded. {} skill(s) now active.", count)
+                    }
+                    Err(e) => format!("Failed to reload skills: {}", e),
+                }
+            }
             _ if self.mcp.is_mcp_tool(name) => match self.mcp.call_tool(name, arguments).await {
                 Ok(result) => result,
                 Err(e) => format!("MCP tool error: {}", e),
@@ -831,7 +883,6 @@ pub fn split_response_chunks(text: &str, max_len: usize) -> Vec<String> {
 }
 
 /// Validate skill directory name: lowercase letters, numbers, hyphens, 1–64 chars.
-#[allow(dead_code)]
 fn validate_skill_name(name: &str) -> Result<(), String> {
     if name.is_empty() {
         return Err("Skill name must not be empty".to_string());
@@ -851,7 +902,6 @@ fn validate_skill_name(name: &str) -> Result<(), String> {
 }
 
 /// Validate a relative path within a skill directory: no '..' components, non-empty.
-#[allow(dead_code)]
 fn validate_skill_path(path: &str) -> Result<(), String> {
     if path.is_empty() {
         return Err("Relative path must not be empty".to_string());

From 785f06bc67fd4d48afed1173f4969b713f2318fe Mon Sep 17 00:00:00 2001
From: Claude <noreply@anthropic.com>
Date: Sat, 21 Feb 2026 14:24:43 +0000
Subject: [PATCH 12/15] feat: add creating-skills skill for agent
 self-authoring

https://claude.ai/code/session_01V5qMEXBhQQuKHeot52gxEh
---
 skills/creating-skills/SKILL.md | 119 ++++++++++++++++++++++++++++++++
 1 file changed, 119 insertions(+)
 create mode 100644 skills/creating-skills/SKILL.md

diff --git a/skills/creating-skills/SKILL.md b/skills/creating-skills/SKILL.md
new file mode 100644
index 0000000..4a2bf22
--- /dev/null
+++ b/skills/creating-skills/SKILL.md
@@ -0,0 +1,119 @@
+---
+name: creating-skills
+description: Use when the user asks to create, add, or write a new bot skill, or wants to teach the bot a new behavior, capability, or workflow.
+tags: [skills, meta]
+---
+
+# Creating Skills
+
+Writes new bot skills as properly-formatted multi-file directories in `skills/` and activates them immediately without restarting the bot.
+
+## When to Use
+
+- "Create a skill for X"
+- "Teach the bot to Y"
+- "Add a skill that does Z"
+- "Write a skill for [topic]"
+
+## Process
+
+### 1. Gather Requirements
+
+Ask the user (one question at a time if unclear):
+- **Name**: Slug for the skill directory — lowercase letters, numbers, hyphens, e.g. `processing-reports`
+- **Trigger**: When should this activate? (becomes the `description` field's "Use when...")
+- **Behavior**: What should the agent do step-by-step?
+- **Files**: Does it need supporting files (reference docs, templates, scripts)?
+
+### 2. Design the Structure
+
+Plan the directory before writing:
+
+```
+skills/<name>/
+├── SKILL.md           # Always required — main entry point
+├── reference.md       # Optional: heavy reference content (100+ lines)
+├── examples.md        # Optional: input/output examples
+└── scripts/           # Optional: utility scripts
+    └── helper.py
+```
+
+Rules from official best practices:
+- References must be **one level deep** from SKILL.md — no chained references
+- Split into separate files only when SKILL.md would exceed ~500 lines
+- SKILL.md body should be concise — it loads into context on every trigger
+
+### 3. Write SKILL.md
+
+SKILL.md must follow this format:
+
+```markdown
+---
+name: skill-name-with-hyphens
+description: Use when [specific triggering conditions — third person, no workflow summary]
+tags: [optional, tags]
+---
+
+# Skill Title
+
+Brief overview (1-2 sentences).
+
+## When to Use
+
+- Trigger condition 1
+- Trigger condition 2
+
+## [Core Instructions]
+
+[Clear, action-oriented, imperative instructions]
+
+## Supporting Files (if any)
+
+**Topic A**: See [reference.md](reference.md)
+**Topic B**: See [examples.md](examples.md)
+```
+
+**Frontmatter rules:**
+- `name`: lowercase letters, numbers, hyphens only; max 64 chars; avoid "anthropic" / "claude"
+- `description`: starts with "Use when..."; third person; no workflow summary; max 1024 chars
+- `tags`: optional list
+
+**Body rules:**
+- Under 500 lines total
+- Action-oriented and imperative
+- Consistent terminology throughout
+- No time-sensitive information
+
+### 4. Write Files
+
+Call `write_skill_file` once per file. Always write `SKILL.md` first:
+
+```
+write_skill_file(skill_name="my-skill", relative_path="SKILL.md", content="---\nname: ...")
+write_skill_file(skill_name="my-skill", relative_path="reference.md", content="# Reference\n...")
+```
+
+### 5. Activate
+
+Call `reload_skills` immediately after all files are written.
+
+Tell the user:
+- The skill is now live (no restart needed)
+- Which files were created
+- What trigger phrase activates it
+
+## Description Writing Guide
+
+```yaml
+# ✅ Good — triggering conditions only, third person
+description: Use when the user asks to generate weekly reports, export data summaries, or create formatted output from raw data.
+
+# ✅ Good — specific triggers
+description: Use when analyzing code for bugs, reviewing pull requests, or the user asks for a code review.
+
+# ❌ Bad — summarizes workflow (causes Claude to skip reading the skill body)
+description: Use when creating reports — reads data, formats it, writes to file.
+
+# ❌ Bad — first person
+description: I help users create reports from their data.
+```

From 529ac247f4bfea1cec18428070c55c25494de7cf Mon Sep 17 00:00:00 2001
From: Claude <noreply@anthropic.com>
Date: Sat, 21 Feb 2026 14:28:58 +0000
Subject: [PATCH 13/15] style: cargo fmt

---
 src/agent.rs | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/src/agent.rs b/src/agent.rs
index b76ac39..4002966 100644
--- a/src/agent.rs
+++ b/src/agent.rs
@@ -888,7 +888,10 @@ fn validate_skill_name(name: &str) -> Result<(), String> {
         return Err("Skill name must not be empty".to_string());
     }
     if name.len() > 64 {
-        return Err(format!("Skill name too long ({} chars, max 64)", name.len()));
+        return Err(format!(
+            "Skill name too long ({} chars, max 64)",
+            name.len()
+        ));
     }
     if !name
         .chars()
@@ -970,7 +973,7 @@ mod tests {
 
     #[test]
     fn test_validate_skill_name_invalid_chars() {
-        assert!(validate_skill_name("My-Skill").is_err());  // uppercase
+        assert!(validate_skill_name("My-Skill").is_err()); // uppercase
         assert!(validate_skill_name("my skill").is_err()); // space
         assert!(validate_skill_name("my_skill").is_err()); // underscore
         assert!(validate_skill_name("my/skill").is_err()); // slash

From c61e2bb152a1fd3835bf067b557b83fe39d9b61c Mon Sep 17 00:00:00 2001
From: Claude <noreply@anthropic.com>
Date: Sat, 21 Feb 2026 16:26:00 +0000
Subject: [PATCH 14/15] docs: mark write_skill_file and reload_skills as done
 in roadmap

---
 README.md | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/README.md b/README.md
index cf6c2f3..b343117 100644
--- a/README.md
+++ b/README.md
@@ -204,6 +204,8 @@ src/
 - [x] Vector embedding search (`qwen/qwen3-embedding-8b`)
 - [x] Scheduling tools (`schedule_task`, `list_scheduled_tasks`, `cancel_scheduled_task`)
 - [x] Bot skills (folder-based, auto-loaded at startup)
+- [x] Agent skill writer (`write_skill_file` tool — creates/updates skill files from within the agent)
+- [x] Agent skill reload (`reload_skills` tool — hot-reloads skill registry without restart)
 
 ### Planned
 

From 456dbac593e51935514f22630cd88fa52a565d76 Mon Sep 17 00:00:00 2001
From: "chinkan.ai" <chinkan@gmail.com>
Date: Sun, 22 Feb 2026 00:27:33 +0800
Subject: [PATCH 15/15] docs: add setup wizard to roadmap in README

---
 README.md | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/README.md b/README.md
index b343117..4440f7f 100644
--- a/README.md
+++ b/README.md
@@ -204,6 +204,7 @@ src/
 - [x] Vector embedding search (`qwen/qwen3-embedding-8b`)
 - [x] Scheduling tools (`schedule_task`, `list_scheduled_tasks`, `cancel_scheduled_task`)
 - [x] Bot skills (folder-based, auto-loaded at startup)
+- [x] Setup wizard (web UI + CLI) for guided `config.toml` creation
 - [x] Agent skill writer (`write_skill_file` tool — creates/updates skill files from within the agent)
 - [x] Agent skill reload (`reload_skills` tool — hot-reloads skill registry without restart)
 
@@ -212,7 +213,6 @@ src/
 - [ ] Image upload support
 - [ ] Google integration tools (Calendar, Email, Drive)
 - [ ] Event trigger framework (e.g., on email receive)
-- [x] Setup wizard (web UI + CLI) for guided `config.toml` creation
 - [ ] WhatsApp support
 - [ ] Webhook mode (in addition to polling)
 - [ ] And more…