cd /Users/apanda/code/agent-spec-code && ls -d .jj .git 2>/dev/null
Working copy changes: A raft_kv/README.md A raft_kv/config.toml A raft_kv/gleam.toml A raft_kv/manifest.toml A raft_kv/src/raft_kv/client.gleam A raft_kv/src/raft_kv/node.gleam A raft_kv/src/raft_kv/types.gleam A raft_kv/src/raft_kv.gleam A raft_kv/test/raft_kv_test.gleam Working copy (@) : ynorsnuo 9062b8e1 (no description set) Parent commit (@-): olrksrwo 3b5ce276 Plan
@ ynorsnuo [email protected] 2026-03-07 13:22:26 9062b8e1 │ (no description set) ○ olrksrwo [email protected] 2026-03-07 13:11:47 3b5ce276 │ Plan ○ ttlxzokp [email protected] 2026-03-07 13:03:43 f324fae7 │ Try more steps in create-emulation ◆ xlusollv [email protected] 2026-03-07 12:42:12 main 95b83ad4 │ Add a third transcript ~
jj describe -m "Add Raft KV store emulation Implements a replicated key-value store using Raft consensus in Gleam. Includes leader election, log replication with AppendEntries, commit notifications to followers, and client operations (put/get/delete) with the same semantics as multipaxos_kv. Configured via TOML config file. Note: heartbeats and election timeouts are intentionally omitted as this is a failure-free emulation focused on log replication mechanics."
Working copy (@) now at: ynorsnuo b0ecefea Add Raft KV store emulation Parent commit (@-) : olrksrwo 3b5ce276 Plan
Done. The working copy commit has been described:
ynorsnuo b0ecefea Add Raft KV store emulation
The commit includes all 9 new files in raft_kv/. Since jj auto-tracks the working copy, all changes are already captured — no explicit add/stage step needed.
Can you create a skill to ensure that you always check whether the repository is using jujustsu (and using jj if that is the case) before trying to use git for any version control operations.
1→# Jujutsu (jj) Version Control
2→
3→**Version:** 0.35.0 (as of March 2026)
4→
5→> **Note:** Jujutsu is under active development. Commands and behavior may change between versions. Check `jj --version` and `jj <command> --help` if something doesn't work as expected.
6→
7→## Key Differences from Git
8→
9→- Working copy is automatically snapshotted on every command
10→- No staging area - all changes are part of the working copy commit
11→- Commits are identified by change IDs (stable) and commit IDs (change with rewrites)
12→- The `@` symbol refers to the current working copy commit
13→- `@-` refers to the parent of the working copy
14→
15→## Common Commands
16→
17→### Status and History
18→
19→```sh
20→jj status # Show working copy changes
21→jj log # Show commit history
22→jj log --limit 5 # Show last 5 commits
23→jj diff # Show changes in working copy
24→jj diff -r @- # Show changes in parent commit
25→```
26→
27→### Creating Commits
28→
29→```sh
30→jj commit -m "message" # Commit working copy with message
31→jj describe -m "message" # Set/change description of current commit
32→jj new # Create new empty commit on top of current
33→jj new -m "message" # Create new commit with message
34→```
35→
36→### File Operations
37→
38→**IMPORTANT:** File operations use `jj file` subcommand, not top-level commands.
39→
40→```sh
41→jj file list # List tracked files
42→jj file track <path> # Start tracking a file
43→jj file untrack <path> # Stop tracking a file (keeps file on disk)
44→jj file untrack 'glob/**' # Untrack files matching glob pattern
45→```
46→
47→> **Gotcha:** There is no `jj untrack` - you must use `jj file untrack`.
48→
49→### Restoring and Reverting
50→
51→```sh
52→jj restore <path> # Restore file to parent commit state
53→jj restore --from @- <path> # Restore from specific revision
54→```
55→
56→### Branches and Bookmarks
57→
58→```sh
59→jj bookmark list # List bookmarks (jj's term for branches)
60→jj bookmark create <name> # Create bookmark at current commit
61→jj bookmark set <name> # Move bookmark to current commit
62→```
63→
64→### Working with History
65→
66→```sh
67→jj squash # Squash current commit into parent
68→jj edit <revision> # Edit an earlier commit
69→jj rebase -d <destination> # Rebase current commit onto destination
70→```
71→
72→## Commit Message Format
73→
74→Use heredoc for multi-line messages:
75→
76→```sh
77→jj commit -m "$(cat <<'EOF'
78→Short summary line
79→
80→Longer description here.
81→Can be multiple paragraphs.
82→
83→Co-Authored-By: Claude Opus 4.5 <[email protected]>
84→EOF
85→)"
86→```
87→
88→## Useful Revsets
89→
90→```sh
91→jj log -r @ # Current commit only
92→jj log -r @- # Parent of current
93→jj log -r @-- # Grandparent
94→jj log -r "heads()" # All head commits
95→jj log -r "root()..@" # All commits from root to current
96→```
97→
98→## Common Workflows
99→
100→### Adding .gitignore After Build Artifacts Exist
101→
102→1. Create `.gitignore` with patterns
103→2. Untrack the files that should be ignored:
104→ ```sh
105→ jj file untrack 'build/**'
106→ ```
107→3. Commit the changes
108→
109→### Fixing the Last Commit
110→
111→```sh
112→# Make changes to files, then:
113→jj squash # Squash changes into parent
114→# Or to change the message:
115→jj describe -m "new message"
116→```
117→
118→## Tips
119→
120→- Use `--no-pager` flag to disable paging for scripted output
121→- Use `-r` or `--revision` to specify which commit to operate on
122→- Check `jj <command> --help` for detailed options
123→- The working copy is always snapshotted automatically - no need to manually add files
124→There's already a jujutsu skill. The issue is that CLAUDE.md's create-emulation skill defers to the VCS check, but the general instructions don't enforce checking jj first. I'll add this as a rule in the memory and also update CLAUDE.md to make it explicit.
1→# CLAUDE.md
2→
3→This file provides guidance to Claude Code (claude.ai/code) when working with code in this repository.
4→
5→## Project Overview
6→This is a collection of Gleam projects, each of which is in turn an emulation for a distributed protocol. Each of the Gleam projects use:
7→
8→- **gleam_stdlib** - Standard library
9→- **gleam_otp** - OTP actor system, supervisors, and process management
10→- **gleeunit** - Testing framework (dev dependency)
11→
12→Use the create-emulation (`.claude/skills/create-emulation.md`) and gleam-otp (`.claude/skills/gleam-otp.md`) skills to create and modify new emulations.
13→
14→Remember, your goal is to produce emulations that are clean and easy to understand, rather than being optimized for performance.
15→Remember, your goal is to produce emulations that are clean and easy to understand, rather than being optimized for performance.
Remember, your goal is to produce emulations that are clean and easy to understand, rather than being optimized for performance. ## Version Control **Always check whether the repository uses Jujutsu before using git.** Look for a `.jj` directory in the repository root. If `.jj` exists, use `jj` commands (see `.claude/skills/jujutsu.md`). Only use `git` if there is no `.jj` directory and a `.git` directory is present instead. Never use `git` commands in a Jujutsu-managed repository.
Done. I've added a Version Control section to CLAUDE.md that instructs to always check for .jj before using git, and to use jj commands when it's present. This will apply across all conversations since CLAUDE.md is always loaded.
Can you also update the gleam-otp skill to include information about tom, which you used for TOML in the raft implementation.
{
"file_path": "/Users/apanda/code/agent-spec-code/raft_kv/src/raft_kv.gleam",
"limit": 30
} 1→import argv
2→import gleam/bit_array
3→import gleam/erlang/process
4→import gleam/int
5→import gleam/io
6→import gleam/list
7→import gleam/result
8→import raft_kv/client
9→import raft_kv/node
10→import tom
11→
12→/// Helper to create a list [1, 2, ..., n]
13→fn range_list(n: Int) -> List(Int) {
14→ int.range(1, n + 1, [], fn(acc, i) { [i, ..acc] })
15→ |> list.reverse
16→}
17→
18→/// Read a file as a string (using Erlang's file module)
19→@external(erlang, "file", "read_file")
20→fn do_read_file(path: String) -> Result(BitArray, dynamic)
21→
22→fn read_file(path: String) -> Result(String, Nil) {
23→ case do_read_file(path) {
24→ Ok(bits) ->
25→ case bit_array.to_string(bits) {
26→ Ok(s) -> Ok(s)
27→ Error(_) -> Error(Nil)
28→ }
29→ Error(_) -> Error(Nil)
30→ }## Testing
## TOML Configuration with `tom`
Add the `tom` package for parsing TOML config files:
```sh
gleam add tom
```
### Reading a TOML file
Gleam has no built-in file I/O, so use an Erlang FFI to read the file, then parse with `tom`:
```gleam
import gleam/bit_array
import gleam/result
import tom
/// Read a file as a string using Erlang's file module
@external(erlang, "file", "read_file")
fn do_read_file(path: String) -> Result(BitArray, dynamic)
fn read_file(path: String) -> Result(String, Nil) {
case do_read_file(path) {
Ok(bits) ->
case bit_array.to_string(bits) {
Ok(s) -> Ok(s)
Error(_) -> Error(Nil)
}
Error(_) -> Error(Nil)
}
}
```
### Parsing TOML values
```gleam
let assert Ok(content) = read_file("config.toml")
let assert Ok(parsed) = tom.parse(content)
// Get values with defaults
let num_nodes = tom.get_int(parsed, ["num_nodes"]) |> result.unwrap(5)
let name = tom.get_string(parsed, ["name"]) |> result.unwrap("default")
```
Available getters: `tom.get_int`, `tom.get_string`, `tom.get_float`, `tom.get_bool`, `tom.get_array`, `tom.get_table`. All take a `Dict` (from `tom.parse`) and a key path as `List(String)`.
## TestingThe file /Users/apanda/code/agent-spec-code/.claude/skills/gleam-otp.md has been updated successfully.
Done. Added a "TOML Configuration with tom" section to the gleam-otp skill covering:
- Adding the dependency
- Reading files via Erlang FFI (since Gleam has no built-in file I/O)
- Parsing TOML and extracting values with tom.get_int, tom.get_string, etc.
Working copy changes: M .claude/skills/gleam-otp.md M CLAUDE.md A raft_kv/README.md A raft_kv/config.toml A raft_kv/gleam.toml A raft_kv/manifest.toml A raft_kv/src/raft_kv/client.gleam A raft_kv/src/raft_kv/node.gleam A raft_kv/src/raft_kv/types.gleam A raft_kv/src/raft_kv.gleam A raft_kv/test/raft_kv_test.gleam Working copy (@) : ynorsnuo 965175c9 Add Raft KV store emulation Parent commit (@-): olrksrwo 3b5ce276 Plan
<persisted-output>
Output too large (50.2KB). Full output saved to: /Users/apanda/.claude/projects/-Users-apanda-code-agent-spec-code/793c0080-be3c-44fd-8add-0fcc29bc00d7/tool-results/bmox50247.txt
Preview (first 2KB):
Modified regular file .claude/skills/gleam-otp.md:
...
107 107: import gleam/io
108 108: ```
109 109:
110: ## TOML Configuration with `tom`
111:
112: Add the `tom` package for parsing TOML config files:
113:
114: ```sh
115: gleam add tom
116: ```
117:
118: ### Reading a TOML file
119:
120: Gleam has no built-in file I/O, so use an Erlang FFI to read the file, then parse with `tom`:
121:
122: ```gleam
123: import gleam/bit_array
124: import gleam/result
125: import tom
126:
127: /// Read a file as a string using Erlang's file module
128: @external(erlang, "file", "read_file")
129: fn do_read_file(path: String) -> Result(BitArray, dynamic)
130:
131: fn read_file(path: String) -> Result(String, Nil) {
132: case do_read_file(path) {
133: Ok(bits) ->
134: case bit_array.to_string(bits) {
135: Ok(s) -> Ok(s)
136: Error(_) -> Error(Nil)
137: }
138: Error(_) -> Error(Nil)
139: }
140: }
141: ```
142:
143: ### Parsing TOML values
144:
145: ```gleam
146: let assert Ok(content) = read_file("config.toml")
147: let assert Ok(parsed) = tom.parse(content)
148:
149: // Get values with defaults
150: let num_nodes = tom.get_int(parsed, ["num_nodes"]) |> result.unwrap(5)
151: let name = tom.get_string(parsed, ["name"]) |> result.unwrap("default")
152: ```
153:
154: Available getters: `tom.get_int`, `tom.get_string`, `tom.get_float`, `tom.get_bool`, `tom.get_array`, `tom.get_table`. All take a `Dict` (from `tom.parse`) and a key path as `List(String)`.
155:
110 156: ## Testing
111 157:
112 158: Test functions must end with `_test` suffix:
...
Modified regular file CLAUDE.md:
...
...
</persisted-output>@ ynorsnuo [email protected] 2026-03-07 13:25:13 965175c9 │ Add Raft KV store emulation ○ olrksrwo [email protected] 2026-03-07 13:11:47 3b5ce276 │ Plan ○ ttlxzokp [email protected] 2026-03-07 13:03:43 f324fae7 │ Try more steps in create-emulation ◆ xlusollv [email protected] 2026-03-07 12:42:12 main 95b83ad4 │ Add a third transcript ~
The working copy already has the description "Add Raft KV store emulation" from earlier, but it now also includes the CLAUDE.md and gleam-otp skill changes. Let me update the description to cover everything.
jj describe -m "$(cat <<'EOF' Add Raft KV store emulation Implements a replicated key-value store using Raft consensus in Gleam. Includes leader election, log replication with AppendEntries, commit notifications to followers, and client operations (put/get/delete) with the same semantics as multipaxos_kv. Configured via TOML config file. Note: heartbeats and election timeouts are intentionally omitted as this is a failure-free emulation focused on log replication mechanics. Also updates project docs: - CLAUDE.md: add version control rule to check for jj before using git - gleam-otp skill: add TOML configuration section documenting the tom package Co-Authored-By: Claude Opus 4.6 <[email protected]> EOF )"
The user doesn't want to proceed with this tool use. The tool use was rejected (eg. if it was a file edit, the new_string was NOT written to the file). STOP what you are doing and wait for the user to tell you how to proceed.