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Code Issues 17 Pull Requests Actions Packages Projects Releases 3 Wiki Activity

feat(kugetsu): add git worktree isolation per session #22

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shoko merged 2 commits from feat/issue-19-worktree-per-session into main 2026-03-30 15:58:41 +02:00
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146
skills/kugetsu/SKILL.md
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@@ -5,12 +5,12 @@ license: MIT
compatibility: Requires opencode CLI, bash, python3, and filesystem access.
metadata:
author: shoko
version: "2.1"
version: "2.2"
---
# kugetsu - OpenCode Session Manager (Issue-Driven)
Manages opencode sessions with a base session + forked session pattern optimized for headless orchestration.
Manages opencode sessions with a base session + forked session pattern optimized for headless orchestration. Each issue gets an isolated git worktree to prevent workspace conflicts.
## Installation
@@ -34,6 +34,12 @@ chmod +x ~/.local/bin/kugetsu
- **PM Agent Session**: Created during init, persistent coordinator for task management
- **Forked Sessions**: One per issue, branched from base via `opencode run --fork --session <base>`
### Git Worktree Isolation
Each issue session gets its own git worktree to prevent conflicts:
- Isolated working directory (no file collisions)
- Isolated branch (no checkout conflicts)
- Shared `.git` objects (efficient storage)
### Directory Structure
```
~/.kugetsu/
@@ -41,6 +47,9 @@ chmod +x ~/.local/bin/kugetsu
│ ├── base.json # Base session metadata
│ ├── pm-agent.json # PM agent session metadata
│ └── github.com-shoko-kugetsu-14.json # Forked session per issue
├── worktrees/
│ ├── github.com-shoko-kugetsu-14/ # Isolated workdir for issue #14
│ └── github.com-shoko-kugetsu-15/ # Isolated workdir for issue #15
└── index.json # Maps session IDs and issue refs to session files
```
@@ -58,8 +67,10 @@ chmod +x ~/.local/bin/kugetsu
### Session File
```json
{
"type": "base|forked|pm_agent",
"type": "forked",
"issue_ref": "github.com/shoko/kugetsu#14",
"opencode_session_id": "ses_xyz789",
"worktree_path": "/home/user/.kugetsu/worktrees/github.com-shoko-kugetsu-14",
"created_at": "2026-03-29T18:16:10+02:00",
"state": "idle"
}
@@ -67,12 +78,33 @@ chmod +x ~/.local/bin/kugetsu
## Issue Ref Format
All issue references use the format: `instance/user/repo#number`
All issue references use the format: `instance/user/repo#identifier`
Examples:
- `github.com/shoko/kugetsu#14`
- `gitlab.com/username/project#42`
- `codeberg.org/user/repo#100`
- `github.com/shoko/kugetsu#14` (issue number)
- `github.com/shoko/kugetsu#-discuss` (discussion, no issue number yet)
- `gitlab.com/username/project#42` (issue number)
## Worktree Behavior
### On `kugetsu start`
1. Derives worktree path from issue ref: `~/.kugetsu/worktrees/{sanitized-ref}/`
2. If worktree exists: removes and recreates (guaranteed clean state)
3. If worktree doesn't exist: creates fresh
4. Clones repo, creates branch `fix/issue-{id}`
5. Runs opencode with `--workdir` pointing to worktree
### On `kugetsu destroy`
1. Removes worktree via `git worktree remove`
2. Deletes session file and index entry
### Repo Configuration
If the repo URL cannot be derived from the issue ref, add to `~/.kugetsu/repos.json`:
```json
{
"github.com/shoko kugetsu#14": "https://custom.repo.url/owner/repo.git"
}
```
## Commands
@@ -93,12 +125,13 @@ kugetsu init
Start task for an issue by forking from base session:
```bash
kugetsu start github.com/shoko/kugetsu#14 "fix authentication bug"
kugetsu start github.com/shoko/kugetsu#-discuss "research auth options"
```
- Creates isolated git worktree for the issue
- Forks new session from base
- Requires PM agent to exist (created by init)
- Stores mapping in `index.json`
- Uses `opencode run --fork --session <base-session-id> "<message>"`
- Uses `opencode run --fork --session <base-session-id> "<message>" --workdir <worktree>`
### kugetsu continue `<issue-ref>` `<message>` [--debug]
@@ -108,7 +141,7 @@ kugetsu continue github.com/shoko/kugetsu#14 "add unit tests"
```
- Looks up session file from index
- Uses `opencode run --continue --session <opencode-session-id> "<message>"`
- Uses `opencode run --continue --session <opencode-session-id> "<message>" --workdir <worktree>`
### kugetsu list
@@ -119,28 +152,28 @@ kugetsu list
Output:
```
ISSUE_REF TYPE SESSION_ID CREATED
─────────────────────────────────────────────────────────────────────────────────────────────────
ISSUE_REF TYPE SESSION_ID WORKTREE
────────────────────────────────────────────────────────────────────────────────────────────────────────
(base) base ses_abc123 N/A
(pm-agent) pm_agent ses_pm_xyz789 2026-03-29T18:16:10+02:00
github.com/shoko/kugetsu#14 forked ses_xyz789 2026-03-29T18:16:10+02:00
(pm-agent) pm_agent ses_pm_xyz789 N/A
github.com/shoko/kugetsu#14 forked ses_xyz789 /home/user/.kugetsu/worktrees/github.com-shoko-kugetsu-14
```
### kugetsu prune [--force]
Remove orphaned sessions (files not in index):
Remove orphaned sessions and worktrees:
```bash
kugetsu prune # Shows what would be deleted
kugetsu prune --force # Deletes orphaned sessions
kugetsu prune --force # Deletes orphaned items
```
- Orphaned = session files in `sessions/` but not in `index.json`
- Orphaned = session files or worktrees not in index
- Always keeps `base.json` and `pm-agent.json`
- Useful after opencode session cleanup
### kugetsu destroy `<issue-ref>` [-y]
Delete session for specific issue:
Delete session and worktree for specific issue:
```bash
kugetsu destroy github.com/shoko/kugetsu#14 # Prompts for confirmation
kugetsu destroy github.com/shoko/kugetsu#14 -y # Skips confirmation
@@ -162,73 +195,6 @@ kugetsu destroy --base -y
**Note**: Destroying base also destroys PM agent since PM depends on base.
- Requires a terminal (TTY) to spawn the opencode TUI
- Creates base session once; subsequent runs error unless `--force` is used
- Stores base session ID in `index.json`
### kugetsu start `<issue-ref>` `<message>` [--debug]
Start task for an issue by forking from base session:
```bash
kugetsu start github.com/shoko/kugetsu#14 "fix authentication bug"
```
- Forks new session from base
- Stores mapping in `index.json`
- Uses `opencode run --fork --session <base-session-id> "<message>"`
### kugetsu continue `<issue-ref>` `<message>` [--debug]
Continue work on an existing issue session:
```bash
kugetsu continue github.com/shoko/kugetsu#14 "add unit tests"
```
- Looks up session file from index
- Uses `opencode run --continue --session <opencode-session-id> "<message>"`
### kugetsu list
List all tracked sessions:
```bash
kugetsu list
```
Output:
```
ISSUE_REF TYPE SESSION_ID CREATED
──────────────────────────────────────────────────────────────────────────────────────────────────
(base) base ses_abc123 N/A
github.com/shoko/kugetsu#14 forked ses_xyz789 2026-03-29T18:16:10+02:00
```
### kugetsu prune [--force]
Remove orphaned sessions (files not in index):
```bash
kugetsu prune # Shows what would be deleted
kugetsu prune --force # Deletes orphaned sessions
```
- Orphaned = session files in `sessions/` but not in `index.json`
- Always keeps `base.json`
- Useful after opencode session cleanup
### kugetsu destroy `<issue-ref>` [-y]
Delete session for specific issue:
```bash
kugetsu destroy github.com/shoko/kugetsu#14 # Prompts for confirmation
kugetsu destroy github.com/shoko/kugetsu#14 -y # Skips confirmation
```
### kugetsu destroy --base [-y]
Delete base session (requires explicit `--base`):
```bash
kugetsu destroy --base -y
```
## Workflow Example
```bash
@@ -238,6 +204,7 @@ kugetsu init
# Start work on issue
kugetsu start github.com/shoko/kugetsu#14 "implement feature X"
# Creates: worktree at ~/.kugetsu/worktrees/github.com-shoko-kugetsu-14/
# Continue later
kugetsu continue github.com/shoko/kugetsu#14 "add tests"
@@ -248,10 +215,10 @@ kugetsu continue github.com/shoko/kugetsu#14 "fix failing test"
# List all sessions
kugetsu list
# Clean up orphaned sessions
# Clean up orphaned items
kugetsu prune --force
# Delete session when done
# Delete session and worktree when done
kugetsu destroy github.com/shoko/kugetsu#14
```
@@ -266,13 +233,14 @@ The pattern:
- Base session created once via TUI (interactive)
- PM agent session created during init (persistent coordinator)
- All subsequent work uses `--fork --session <base>` or `--continue --session <forked>`
- Each session works in isolated git worktree
## Recovery
If opencode sessions become out of sync:
1. `kugetsu list` shows tracked sessions
2. `kugetsu prune` removes orphaned files
2. `kugetsu prune` removes orphaned files and worktrees
3. For full reset: `kugetsu destroy --base -y && kugetsu init`
## Remote Access via SSH (Optional)
@@ -362,4 +330,4 @@ opencode run --fork --session <base-session-id> "task"
opencode run --continue --session <forked-session-id> "continue"
```
Tradeoff: No issue mapping, no index, manual session tracking.
Tradeoff: No issue mapping, no index, manual session tracking, no worktree isolation.

192
skills/kugetsu/scripts/kugetsu
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@@ -3,6 +3,8 @@ set -euo pipefail
KUGETSU_DIR="${KUGETSU_DIR:-$HOME/.kugetsu}"
SESSIONS_DIR="$KUGETSU_DIR/sessions"
WORKTREES_DIR="$KUGETSU_DIR/worktrees"
REPOS_CONFIG="$KUGETSU_DIR/repos.json"
INDEX_FILE="$KUGETSU_DIR/index.json"
usage() {
@@ -53,6 +55,109 @@ ensure_dirs() {
mkdir -p "$SESSIONS_DIR"
}
ensure_worktree_dir() {
mkdir -p "$WORKTREES_DIR"
}
issue_ref_to_worktree_name() {
local issue_ref="$1"
echo "$issue_ref" | sed 's/[\/:]/-/g' | sed 's/#/--/'
}
issue_ref_to_worktree_path() {
local issue_ref="$1"
local worktree_name=$(issue_ref_to_worktree_name "$issue_ref")
echo "$WORKTREES_DIR/$worktree_name"
}
issue_ref_to_branch_name() {
local issue_ref="$1"
local number_part=$(echo "$issue_ref" | grep -oE '#[0-9]+$' || echo "")
if [ -n "$number_part" ]; then
echo "fix/issue-${number_part#\#}"
else
local identifier=$(echo "$issue_ref" | grep -oE '#[^-]+$' || echo "")
if [ -n "$identifier" ]; then
local clean_id=$(echo "$identifier" | sed 's/^#//' | sed 's/-/_/g')
echo "fix/${clean_id}"
else
echo "fix/issue-temp"
fi
fi
}
get_repo_url() {
local issue_ref="$1"
if [ -f "$REPOS_CONFIG" ]; then
local url=$(python3 -c "import json, sys; d=json.load(open('$REPOS_CONFIG')); print(d.get('$issue_ref', ''))" 2>/dev/null || echo "")
if [ -n "$url" ]; then
echo "$url"
return
fi
fi
local instance=$(echo "$issue_ref" | cut -d'/' -f1 | cut -d'#' -f1)
local rest=$(echo "$issue_ref" | sed 's/.*\///' | sed 's/#.*//')
echo "https://${instance}/${rest}.git"
}
worktree_exists() {
local issue_ref="$1"
local worktree_path=$(issue_ref_to_worktree_path "$issue_ref")
[ -d "$worktree_path" ]
}
create_worktree() {
local issue_ref="$1"
local worktree_path=$(issue_ref_to_worktree_path "$issue_ref")
local branch_name=$(issue_ref_to_branch_name "$issue_ref")
local repo_url=$(get_repo_url "$issue_ref")
if [ -z "$repo_url" ]; then
echo "Error: Cannot determine repo URL for '$issue_ref'" >&2
echo "Please add to $REPOS_CONFIG or ensure worktree exists" >&2
exit 1
fi
ensure_worktree_dir
if worktree_exists "$issue_ref"; then
echo "Removing existing worktree at '$worktree_path'..."
git worktree remove "$worktree_path" 2>/dev/null || rm -rf "$worktree_path"
fi
echo "Creating worktree at '$worktree_path'..."
git clone --bare "$repo_url" "$worktree_path" 2>/dev/null || {
echo "Error: Failed to clone repository" >&2
exit 1
}
echo "Creating branch '$branch_name'..."
(cd "$worktree_path" && git checkout -b "$branch_name" origin/main 2>/dev/null || git checkout -b "$branch_name" main 2>/dev/null) || {
echo "Warning: Could not checkout branch (may need to run from within worktree after session)" >&2
}
echo "Worktree created at: $worktree_path"
}
remove_worktree_for_issue() {
local issue_ref="$1"
local worktree_path=$(issue_ref_to_worktree_path "$issue_ref")
if worktree_exists "$issue_ref"; then
echo "Removing worktree at '$worktree_path'..."
git worktree remove "$worktree_path" 2>/dev/null || rm -rf "$worktree_path"
fi
}
get_worktree_path_for_session() {
local session_file="$1"
if [ -f "$session_file" ]; then
python3 -c "import json; print(json.load(open('$session_file')).get('worktree_path', ''))" 2>/dev/null || echo ""
else
echo ""
fi
}
issue_ref_to_filename() {
local issue_ref="$1"
echo "$issue_ref" | sed 's/[\/:]/-/g' | sed 's/#/-/'
@@ -329,6 +434,9 @@ cmd_start() {
exit 1
fi
local worktree_path=$(issue_ref_to_worktree_path "$issue_ref")
create_worktree "$issue_ref"
local session_file="$(issue_ref_to_filename "$issue_ref").json"
local before_sessions=$(opencode session list 2>/dev/null | grep -oP '^ses_\w+' | sort)
@@ -336,9 +444,9 @@ cmd_start() {
echo "Forking session for '$issue_ref'..."
if [ "$DEBUG_MODE" = true ]; then
opencode run --fork --session "$base_session_id" "$message" 2>&1 | tee "$SESSIONS_DIR/$session_file.debug.log"
opencode run --fork --session "$base_session_id" "$message" --workdir "$worktree_path" 2>&1 | tee "$SESSIONS_DIR/$session_file.debug.log"
else
opencode run --fork --session "$base_session_id" "$message" 2>&1
opencode run --fork --session "$base_session_id" "$message" --workdir "$worktree_path" 2>&1
fi
local after_sessions=$(opencode session list 2>/dev/null | grep -oP '^ses_\w+' | sort)
@@ -352,15 +460,17 @@ cmd_start() {
if [ -z "$new_session_id" ]; then
echo "Error: Could not find newly created session" >&2
remove_worktree_for_issue "$issue_ref"
exit 1
fi
printf '{"type": "forked", "issue_ref": "%s", "opencode_session_id": "%s", "created_at": "%s", "state": "idle"}\n' \
"$issue_ref" "$new_session_id" "$(date -Iseconds)" > "$SESSIONS_DIR/$session_file"
printf '{"type": "forked", "issue_ref": "%s", "opencode_session_id": "%s", "worktree_path": "%s", "created_at": "%s", "state": "idle"}\n' \
"$issue_ref" "$new_session_id" "$worktree_path" "$(date -Iseconds)" > "$SESSIONS_DIR/$session_file"
add_issue_to_index "$issue_ref" "$session_file"
echo "Session started for '$issue_ref': $new_session_id"
echo "Worktree: $worktree_path"
}
cmd_continue() {
@@ -405,6 +515,7 @@ cmd_continue() {
fi
local opencode_session_id=$(python3 -c "import json; print(json.load(open('$session_path'))['opencode_session_id'])")
local worktree_path=$(python3 -c "import json; print(json.load(open('$session_path')).get('worktree_path', ''))" 2>/dev/null || echo "")
if ! check_opencode_session_exists "$opencode_session_id"; then
echo "Warning: Session may have expired in opencode" >&2
@@ -412,22 +523,31 @@ cmd_continue() {
fi
echo "Continuing session for '$issue_ref'..."
if [ "$DEBUG_MODE" = true ]; then
opencode run --continue --session "$opencode_session_id" "$message" 2>&1 | tee "$session_path.debug.log"
if [ -n "$worktree_path" ] && [ -d "$worktree_path" ]; then
echo "Using worktree: $worktree_path"
if [ "$DEBUG_MODE" = true ]; then
opencode run --continue --session "$opencode_session_id" "$message" --workdir "$worktree_path" 2>&1 | tee "$session_path.debug.log"
else
opencode run --continue --session "$opencode_session_id" "$message" --workdir "$worktree_path"
fi
else
opencode run --continue --session "$opencode_session_id" "$message"
if [ "$DEBUG_MODE" = true ]; then
opencode run --continue --session "$opencode_session_id" "$message" 2>&1 | tee "$session_path.debug.log"
else
opencode run --continue --session "$opencode_session_id" "$message"
fi
fi
}
cmd_list() {
ensure_dirs
printf "%-50s %-10s %-25s %s\n" "ISSUE_REF" "TYPE" "SESSION_ID" "CREATED"
printf "%-50s %-10s %-25s %s\n" "─────────" "─────" "──────────" "───────"
printf "%-50s %-10s %-25s %-40s\n" "ISSUE_REF" "TYPE" "SESSION_ID" "WORKTREE"
printf "%-50s %-10s %-25s %-40s\n" "─────────" "─────" "──────────" "────────"
local base_session_id=$(get_base_session_id)
if [ -n "$base_session_id" ] && [ "$base_session_id" != "null" ]; then
printf "%-50s %-10s %-25s %s\n" "(base)" "base" "$base_session_id" "N/A"
printf "%-50s %-10s %-25s %-40s\n" "(base)" "base" "$base_session_id" "N/A"
fi
local pm_agent_session_id=$(get_pm_agent_session_id)
@@ -436,7 +556,7 @@ cmd_list() {
if [ -f "$SESSIONS_DIR/pm-agent.json" ]; then
pm_created=$(python3 -c "import json; print(json.load(open('$SESSIONS_DIR/pm-agent.json'))['created_at'])" 2>/dev/null || echo "N/A")
fi
printf "%-50s %-10s %-25s %s\n" "(pm-agent)" "pm_agent" "$pm_agent_session_id" "$pm_created"
printf "%-50s %-10s %-25s %-40s\n" "(pm-agent)" "pm_agent" "$pm_agent_session_id" "N/A"
fi
local index=$(read_index)
@@ -452,8 +572,9 @@ cmd_list() {
local issue_ref=$(python3 -c "import json; print(json.load(open('$session_file'))['issue_ref'])" 2>/dev/null || echo "$filename")
local sess_id=$(python3 -c "import json; print(json.load(open('$session_file'))['opencode_session_id'])" 2>/dev/null || echo "unknown")
local created=$(python3 -c "import json; print(json.load(open('$session_file'))['created_at'])" 2>/dev/null || echo "unknown")
local worktree=$(python3 -c "import json; print(json.load(open('$session_file')).get('worktree_path', 'N/A'))" 2>/dev/null || echo "N/A")
printf "%-50s %-10s %-25s %s\n" "$issue_ref" "forked" "$sess_id" "$created"
printf "%-50s %-10s %-25s %-40s\n" "$issue_ref" "forked" "$sess_id" "$worktree"
fi
done
}
@@ -471,6 +592,7 @@ cmd_prune() {
done
ensure_dirs
ensure_worktree_dir
local index=$(read_index)
local index_session_files=$(echo "$index" | python3 -c "import sys, json; d=json.load(sys.stdin); sessions=set(d['issues'].values()); sessions.add('base.json'); sessions.add('pm-agent.json'); print('\n'.join(sessions))" 2>/dev/null || echo -e "base.json\npm-agent.json")
@@ -485,21 +607,47 @@ cmd_prune() {
fi
done
if [ ${#orphaned[@]} -eq 0 ]; then
echo "No orphaned sessions found"
local orphaned_worktrees=()
if [ -d "$WORKTREES_DIR" ]; then
for worktree_path in "$WORKTREES_DIR"/*; do
if [ -d "$worktree_path" ]; then
local worktree_name=$(basename "$worktree_path")
local session_name="${worktree_name}.json"
if ! echo "$index_session_files" | grep -q "^${session_name}$"; then
orphaned_worktrees+=("$worktree_path")
fi
fi
done
fi
if [ ${#orphaned[@]} -eq 0 ] && [ ${#orphaned_worktrees[@]} -eq 0 ]; then
echo "No orphaned sessions or worktrees found"
return
fi
echo "Found ${#orphaned[@]} orphaned session(s):"
for f in "${orphaned[@]}"; do
echo " - $(basename "$f")"
done
if [ ${#orphaned[@]} -gt 0 ]; then
echo "Found ${#orphaned[@]} orphaned session(s):"
for f in "${orphaned[@]}"; do
echo " - $(basename "$f")"
done
fi
if [ ${#orphaned_worktrees[@]} -gt 0 ]; then
echo "Found ${#orphaned_worktrees[@]} orphaned worktree(s):"
for wt in "${orphaned_worktrees[@]}"; do
echo " - $(basename "$wt")"
done
fi
if [ "$force" = true ]; then
echo "Removing orphaned sessions (force mode)..."
echo "Removing orphaned items (force mode)..."
for f in "${orphaned[@]}"; do
rm -f "$f"
echo "Removed: $(basename "$f")"
echo "Removed session: $(basename "$f")"
done
for wt in "${orphaned_worktrees[@]}"; do
git worktree remove "$wt" 2>/dev/null || rm -rf "$wt"
echo "Removed worktree: $(basename "$wt")"
done
else
echo "Run with --force to remove"
@@ -581,14 +729,16 @@ cmd_destroy() {
local session_path="$SESSIONS_DIR/$session_file"
if [ "$force" = true ]; then
remove_worktree_for_issue "$target"
rm -f "$session_path"
remove_issue_from_index "$target"
echo "Session for '$target' destroyed"
else
echo "Delete session for '$target'? [y/N] "
echo "Delete session and worktree for '$target'? [y/N] "
local reply
read reply
if [ "$reply" = "y" ] || [ "$reply" = "Y" ]; then
remove_worktree_for_issue "$target"
rm -f "$session_path"
remove_issue_from_index "$target"
echo "Session for '$target' destroyed"