feat: add memory management tools and utility commands

src/tool/memory/forget.rs

@@ -0,0 +1,41 @@
+use serde_json::{json, Value};
+use anyhow::{Result, anyhow};
+use super::super::Tool;
+use super::super::ToolCtx;
+use crate::model::memory::Memory;
+
+pub struct Forget;
+
+impl Tool for Forget {
+    fn name(&self) -> &'static str {
+        "forget"
+    }
+
+    fn description(&self) -> &'static str {
+        "Remove a specific memory entry by its name. Use recall first to find the exact name if unsure."
+    }
+
+    fn parameters(&self) -> Value {
+        json!({
+            "type": "object",
+            "properties": {
+                "name": {
+                    "type": "string",
+                    "description": "Name of the memory to remove (use recall to find exact names)"
+                }
+            },
+            "required": ["name"]
+        })
+    }
+
+    fn run(&self, ctx: &ToolCtx, args: &Value) -> Result<String> {
+        let name = args.get("name")
+            .and_then(|v| v.as_str())
+            .ok_or_else(|| anyhow!("missing required argument: name"))?;
+
+        Memory::remove(&ctx.memory_dir, name)
+            .map_err(|e| anyhow!("failed to remove memory '{}': {}", name, e))?;
+
+        Ok(format!("removed memory '{}'", name))
+    }
+}

src/tool/memory/mod.rs

@@ -0,0 +1,3 @@
+pub mod forget;
+pub mod recall;
+pub mod remember;

src/tool/memory/recall.rs

@@ -0,0 +1,65 @@
+use serde_json::{json, Value};
+use anyhow::{Result, anyhow};
+use super::super::Tool;
+use super::super::ToolCtx;
+use crate::model::memory::Memory;
+
+pub struct Recall;
+
+impl Tool for Recall {
+    fn name(&self) -> &'static str {
+        "recall"
+    }
+
+    fn description(&self) -> &'static str {
+        "Read memory entries. Pass a name to read a specific entry, or omit name to list all entries in the memory index. The memory index is also automatically injected into your system prompt."
+    }
+
+    fn parameters(&self) -> Value {
+        json!({
+            "type": "object",
+            "properties": {
+                "name": {
+                    "type": "string",
+                    "description": "Optional: exact name of a specific memory entry to read. If omitted, lists all entries."
+                }
+            }
+        })
+    }
+
+    fn run(&self, ctx: &ToolCtx, args: &Value) -> Result<String> {
+        if let Some(name) = args.get("name").and_then(|v| v.as_str()) {
+            if name.is_empty() {
+                return list_all(ctx);
+            }
+            let memory = Memory::read(&ctx.memory_dir, name)
+                .map_err(|e| anyhow!("memory '{}' not found: {}", name, e))?;
+            Ok(format!(
+                "---\nname: {}\ndescription: {}\nkind: {}\nlifecycle: {}\n---\n\n{}",
+                memory.name,
+                memory.description,
+                memory.kind,
+                memory.lifecycle,
+                memory.content,
+            ))
+        } else {
+            list_all(ctx)
+        }
+    }
+}
+
+fn list_all(ctx: &ToolCtx) -> Result<String> {
+    let names = Memory::list(&ctx.memory_dir);
+    if names.is_empty() {
+        return Ok("(no memory entries)".to_string());
+    }
+    let mut lines = format!("Memory index ({} entries):\n", names.len());
+    for name in &names {
+        if let Ok(mem) = Memory::read(&ctx.memory_dir, name) {
+            lines.push_str(&format!("- {} [{}]: {}\n", name, mem.kind, mem.description));
+        } else {
+            lines.push_str(&format!("- {}\n", name));
+        }
+    }
+    Ok(lines)
+}

src/tool/memory/remember.rs

@@ -0,0 +1,79 @@
+use serde_json::{json, Value};
+use anyhow::{Result, anyhow};
+use super::super::Tool;
+use super::super::ToolCtx;
+use crate::model::memory::Memory;
+
+pub struct Remember;
+
+impl Tool for Remember {
+    fn name(&self) -> &'static str {
+        "remember"
+    }
+
+    fn description(&self) -> &'static str {
+        "Save a piece of information to persistent project memory. Memory entries are injected into future conversations via the system prompt, so use this to record conventions, preferences, and important context."
+    }
+
+    fn parameters(&self) -> Value {
+        json!({
+            "type": "object",
+            "properties": {
+                "name": {
+                    "type": "string",
+                    "description": "Short unique name for the memory (kebab-case, e.g. 'testing-conventions')"
+                },
+                "description": {
+                    "type": "string",
+                    "description": "One-line summary shown in the memory index"
+                },
+                "content": {
+                    "type": "string",
+                    "description": "The memory content body"
+                },
+                "kind": {
+                    "type": "string",
+                    "description": "Type of memory: 'project', 'reference', 'lesson', or 'feedback'",
+                    "enum": ["project", "reference", "lesson", "feedback"]
+                }
+            },
+            "required": ["name", "description", "content", "kind"]
+        })
+    }
+
+    fn run(&self, ctx: &ToolCtx, args: &Value) -> Result<String> {
+        let name = args.get("name")
+            .and_then(|v| v.as_str())
+            .ok_or_else(|| anyhow!("missing required argument: name"))?;
+        let description = args.get("description")
+            .and_then(|v| v.as_str())
+            .ok_or_else(|| anyhow!("missing required argument: description"))?;
+        let content = args.get("content")
+            .and_then(|v| v.as_str())
+            .ok_or_else(|| anyhow!("missing required argument: content"))?;
+        let kind = args.get("kind")
+            .and_then(|v| v.as_str())
+            .ok_or_else(|| anyhow!("missing required argument: kind"))?;
+
+        if Memory::slugify(name).is_none() {
+            anyhow::bail!("invalid memory name: must produce a valid slug (alphanumeric + hyphens, 1-80 chars)");
+        }
+
+        let now = chrono::Utc::now().timestamp_millis();
+        let memory = Memory {
+            name: name.to_string(),
+            description: description.to_string(),
+            content: content.to_string(),
+            kind: kind.to_string(),
+            created_at: now,
+            updated_at: now,
+            outcome: None,
+            lifecycle: "new".to_string(),
+        };
+
+        memory.write(&ctx.memory_dir)
+            .map_err(|e| anyhow!("failed to write memory '{}': {}", name, e))?;
+
+        Ok(format!("saved memory '{}' ({})", name, kind))
+    }
+}