feat: release v0.4.0

Added:
- wiggum resume - recover interrupted loops
- wiggum diff - compare plan files
- wiggum retro - generate improvement suggestions
- wiggum split - interactively split oversized tasks
- wiggum templates - reusable task snippets
- wiggum prices - model pricing display
- Per-task cost estimation in dry-run output
- domain::pricing module with bundled model pricing

Dependencies:
- Added dirs crate for cross-platform home directory detection

Author: greysquirr3l

CHANGELOG.md

@@ -6,6 +6,23 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/), and this
 
 ## [Unreleased]
 
+## [0.4.0] - 2026-03-15
+
+### Added
+
+- `wiggum resume` command to recover interrupted orchestrator loops — auto-detects the last in-progress or next task, generates resume prompt with context
+- `wiggum diff <old.toml> <new.toml>` command to compare two plan files — shows phase changes, task additions/removals, and dependency modifications
+- `wiggum retro` command to generate improvement suggestions from PROGRESS.md learnings — analyzes retry patterns, blocking gates, and complexity issues
+- `wiggum split --task <slug>` command to interactively split oversized tasks into smaller units — includes dependency rewiring
+- `wiggum templates` subcommand with `list`, `show`, and `save` operations — enables reusable task snippets stored in `~/.wiggum/templates/`
+- `wiggum prices` command to display model pricing data — shows bundled rates for cost estimation
+- Per-task cost estimation in `--dry-run --estimate-tokens` output — shows estimated costs for Claude, GPT-4, and Gemini models
+- `domain::pricing` module with bundled model pricing data
+
+### Dependencies
+
+- Added `dirs` crate for cross-platform home directory detection (used by templates)
+
 ## [0.3.2] - 2026-03-11
 
 ### Added
@@ -57,7 +74,8 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/), and this
 - VCS-aware reporting with git timeline
 - mdBook documentation site
 
-[Unreleased]: https://github.com/greysquirr3l/wiggum/compare/v0.3.2...HEAD
+[Unreleased]: https://github.com/greysquirr3l/wiggum/compare/v0.4.0...HEAD
+[0.4.0]: https://github.com/greysquirr3l/wiggum/compare/v0.3.2...v0.4.0
 [0.3.2]: https://github.com/greysquirr3l/wiggum/compare/v0.3.1...v0.3.2
 [0.3.1]: https://github.com/greysquirr3l/wiggum/compare/v0.3.0...v0.3.1
 [0.3.0]: https://github.com/greysquirr3l/wiggum/compare/v0.2.0...v0.3.0

Cargo.lock

@@ -1,6 +1,6 @@
 [package]
 name = "wiggum"
-version = "0.3.2"
+version = "0.4.0"
 edition = "2024"
 rust-version = "1.94.0"
 description = "AI orchestration scaffold generator for the Ralph Wiggum loop"
@@ -34,6 +34,9 @@ clap = { version = "4", features = ["derive"] }
 # Interactive prompts
 dialoguer = "0.12"
 
+# Home directory detection
+dirs = "6"
+
 # Serialization
 serde = { version = "1", features = ["derive"] }
 serde_json = "1"

Cargo.toml

@@ -121,4 +121,99 @@ pub enum Command {
         #[arg(long)]
         dry_run: bool,
     },
+
+    /// Resume an interrupted orchestrator loop from the last in-progress task
+    Resume {
+        /// Path to PROGRESS.md (default: ./PROGRESS.md)
+        #[arg(long, default_value = "PROGRESS.md")]
+        progress: PathBuf,
+
+        /// Path to the plan TOML file (default: ./plan.toml)
+        #[arg(long, default_value = "plan.toml")]
+        plan: PathBuf,
+
+        /// Resume from a specific task instead of auto-detecting
+        #[arg(long)]
+        task: Option<String>,
+
+        /// Show what would be resumed without emitting prompt
+        #[arg(long)]
+        dry_run: bool,
+    },
+
+    /// Compare two plan.toml files and show what changed
+    Diff {
+        /// Path to the original plan TOML file
+        old: PathBuf,
+
+        /// Path to the new plan TOML file
+        new: PathBuf,
+    },
+
+    /// Generate retrospective suggestions from learnings in PROGRESS.md
+    Retro {
+        /// Path to PROGRESS.md (default: ./PROGRESS.md)
+        #[arg(long, default_value = "PROGRESS.md")]
+        progress: PathBuf,
+
+        /// Auto-apply non-destructive suggestions to plan.toml
+        #[arg(long)]
+        apply: bool,
+
+        /// Path to the plan TOML file (for --apply)
+        #[arg(long, default_value = "plan.toml")]
+        plan: PathBuf,
+    },
+
+    /// Split an oversized task into multiple smaller tasks
+    Split {
+        /// Path to the plan TOML file
+        plan: PathBuf,
+
+        /// Slug of the task to split
+        #[arg(long)]
+        task: String,
+
+        /// Non-interactive mode: split into N tasks
+        #[arg(long)]
+        into: Option<u32>,
+    },
+
+    /// Manage reusable task templates
+    #[command(subcommand)]
+    Templates(TemplatesCmd),
+
+    /// Update model pricing data
+    Prices {
+        /// Update prices from the latest source
+        #[arg(long)]
+        update: bool,
+    },
+}
+
+#[derive(Debug, Subcommand)]
+pub enum TemplatesCmd {
+    /// List available templates
+    List,
+
+    /// Show details of a specific template
+    Show {
+        /// Template name
+        name: String,
+    },
+
+    /// Save a task from the current plan as a template
+    Save {
+        /// Path to the plan TOML file
+        #[arg(long)]
+        plan: PathBuf,
+
+        /// Slug of the task to save
+        #[arg(long)]
+        task: String,
+
+        /// Template name (defaults to task slug)
+        #[arg(long)]
+        name: Option<String>,
+    },
 }