The user has untracked the build files. Let me check the status and create the commit.
Working copy changes: A .gitignore A CLAUDE.md A README.md A gleam.toml A manifest.toml A src/otp_test.gleam A src/server/actor.gleam A src/server/client.gleam A test/otp_test_test.gleam A ../skills-notes.txt A ../tutorial-vars/.gitignore A ../tutorial-vars/README.md A ../tutorial-vars/gleam.toml A ../tutorial-vars/manifest.toml A ../tutorial-vars/src/vars/internal.gleam A ../tutorial-vars/src/vars.gleam A ../tutorial-vars/test/vars_test.gleam Working copy (@) : mxqsznvz 345f1c8c (no description set) Parent commit (@-): zzzzzzzz 00000000 (empty) (no description set)
Now I can see the relevant files. There are some files from parent directories too (../skills-notes.txt, ../tutorial-vars/). I should create a commit with just the otp_test changes. Let me create the commit with a description.
jj commit -m "$(cat <<'EOF' Implement distributed counter actors with eventual consistency - Add server actor that maintains an integer state with set/get operations - Server only updates state if new value is larger than current - Servers sync with peers periodically to achieve eventual consistency - Add client actor that sends random set/get messages to a server - Main creates 5 servers and 10 clients, exits when all servers converge - Add CLAUDE.md with project guidance - Add .gitignore for Gleam build artifacts Co-Authored-By: Claude Opus 4.5 <[email protected]> EOF )"
Working copy (@) now at: ovlsvkqq ec6a5f9a (empty) (no description set) Parent commit (@-) : mxqsznvz 9faa2cdb Implement distributed counter actors with eventual consistency
@ ovlsvkqq [email protected] 2026-03-07 10:03:36 ec6a5f9a │ (empty) (no description set) ○ mxqsznvz [email protected] 2026-03-07 10:03:36 9faa2cdb │ Implement distributed counter actors with eventual consistency ◆ zzzzzzzz root() 00000000
Done. Created commit 9faa2cdb with the message:
Implement distributed counter actors with eventual consistency
- Add server actor that maintains an integer state with set/get operations
- Server only updates state if new value is larger than current
- Servers sync with peers periodically to achieve eventual consistency
- Add client actor that sends random set/get messages to a server
- Main creates 5 servers and 10 clients, exits when all servers converge
- Add CLAUDE.md with project guidance
- Add .gitignore for Gleam build artifacts
Can you create a skills file that would help working with gleam and this codebase in the future?
The user wants me to create a skills file for working with Gleam and this codebase. Skills files are typically markdown files that provide guidance for future Claude sessions. Let me create a comprehensive skills file that covers Gleam basics, the gleam_otp actor patterns used in this codebase, and any specific patterns.
I should put this in a .claude/skills directory or similar location. Let me check if there's a standard location.
mkdir -p /Users/apanda/code/agent-spec-code/otp_test/.claude/skills
# Gleam OTP Development
## Build Commands
```sh
gleam build # Compile the project
gleam run # Run the project
gleam test # Run all tests
gleam add <pkg> # Add a dependency
gleam format # Format code
```
## Actor Pattern with gleam_otp
### Basic Actor Structure
```gleam
import gleam/otp/actor
import gleam/erlang/process.{type Subject}
// 1. Define state type
pub type State {
State(value: Int, self: Subject(Message))
}
// 2. Define message type
pub type Message {
Set(value: Int) // Fire-and-forget
Get(reply_with: Subject(Int)) // Request-response
}
// 3. Implement handler
fn handle_message(state: State, message: Message) -> actor.Next(State, Message) {
case message {
Set(value) -> actor.continue(State(..state, value: value))
Get(client) -> {
process.send(client, state.value)
actor.continue(state)
}
}
}
// 4. Start function
pub fn start() -> Result(Subject(Message), actor.StartError) {
actor.new_with_initialiser(1000, fn(self) {
actor.initialised(State(value: 0, self: self))
|> actor.returning(self)
|> Ok
})
|> actor.on_message(handle_message)
|> actor.start
|> result.map(fn(started) { started.data })
}
```
### Key Patterns
**Fire-and-forget message:**
```gleam
pub fn set(subject: Subject(Message), value: Int) -> Nil {
actor.send(subject, Set(value))
}
```
**Request-response (blocking call):**
```gleam
pub fn get(subject: Subject(Message)) -> Int {
actor.call(subject, 1000, Get) // 1000ms timeout
}
```
**Self-messaging (for periodic tasks):**
```gleam
// In initialiser or handler:
process.send_after(state.self, 100, Sync) // Send Sync message after 100ms
```
**Capturing self reference:**
Use `actor.new_with_initialiser` instead of `actor.new` to get access to the actor's own Subject in the initialiser callback.
### Handler Return Values
- `actor.continue(new_state)` - Keep running with new state
- `actor.stop()` - Stop the actor gracefully
### Common Imports
```gleam
import gleam/otp/actor
import gleam/erlang/process.{type Subject}
import gleam/result
import gleam/list
import gleam/int
import gleam/io
```
## Testing
Test functions must end with `_test` suffix:
```gleam
import gleeunit
pub fn main() -> Nil {
gleeunit.main()
}
pub fn my_feature_test() {
assert some_condition == True
}
```
## Common Patterns in This Codebase
### Peer-to-peer Synchronization
Servers maintain a list of peers and periodically broadcast their state:
```gleam
Sync -> {
list.each(state.peers, fn(peer) {
process.send(peer, Set(state.value))
})
process.send_after(state.self, 100, Sync)
actor.continue(state)
}
```
### Convergence Check
Poll until all actors have the same value:
```gleam
fn wait_for_convergence(servers: List(Subject(Message))) -> Nil {
let values = list.map(servers, get)
case values {
[first, ..rest] -> {
let all_same = list.all(rest, fn(v) { v == first })
case all_same && first > 0 {
True -> io.println("Converged!")
False -> {
process.sleep(100)
wait_for_convergence(servers)
}
}
}
[] -> Nil
}
}
```
## Gleam Syntax Quick Reference
**Pattern matching:**
```gleam
case value {
Some(x) -> x
None -> 0
}
```
**Record update:**
```gleam
State(..state, value: new_value)
```
**Pipe operator:**
```gleam
value
|> transform1
|> transform2
```
**Assert (panics on failure):**
```gleam
let assert Ok(result) = maybe_fails()
```
**List operations:**
```gleam
list.map(items, fn(x) { x + 1 })
list.each(items, fn(x) { io.println(x) })
list.all(items, fn(x) { x > 0 })
list.flat_map(items, fn(x) { [x, x] })
```
File created successfully at: /Users/apanda/code/agent-spec-code/otp_test/.claude/skills/gleam-otp.md
I've created a skills file. Let me also add it to the commit. I should also update CLAUDE.md to reference the skills file.
Working copy changes: A .claude/skills/gleam-otp.md Working copy (@) : ovlsvkqq 01ab63f5 (no description set) Parent commit (@-): mxqsznvz 9faa2cdb Implement distributed counter actors with eventual consistency
jj commit -m "$(cat <<'EOF' Add Gleam OTP skills file for Claude Code Documents actor patterns, common imports, and codebase conventions. Co-Authored-By: Claude Opus 4.5 <[email protected]> EOF )"
Working copy (@) now at: nxqszyrs 9f200dac (empty) (no description set) Parent commit (@-) : ovlsvkqq c5b91ac4 Add Gleam OTP skills file for Claude Code
Created .claude/skills/gleam-otp.md with:
@ nxqszyrs [email protected] 2026-03-07 10:05:55 9f200dac │ (empty) (no description set) ○ ovlsvkqq [email protected] 2026-03-07 10:05:55 c5b91ac4 │ Add Gleam OTP skills file for Claude Code ○ mxqsznvz [email protected] 2026-03-07 10:03:36 9faa2cdb │ Implement distributed counter actors with eventual consistency ◆ zzzzzzzz root() 00000000
Committed as c5b91ac4. The skills file will help future Claude sessions understand Gleam OTP actor patterns and the conventions used in this codebase.
Can you also add a skills file for jujutsu. Remember in particular that you ran into some issues with untracking. Also be sure to record the current version, jujutsu is under development so things seem to change.
The user wants me to create a skills file for jujutsu (jj). I should document:
1. The current version
2. Common commands
3. The issue I ran into with untracking files (the correct command is jj file untrack not jj untrack)
4. Other useful patterns
Let me first check the jj version.
Now let me check the help for some key commands to make sure I document them correctly.
File operations
Usage: jj file [OPTIONS] <COMMAND>
Commands:
annotate Show the source change for each line of the target file
chmod Sets or removes the executable bit for paths in the repo
list List files in a revision
show Print contents of files in a revision
track Start tracking specified paths in the working copy
untrack Stop tracking specified paths in the working copy
Options:
-h, --help
Print help (see a summary with '-h')
Global Options:
-R, --repository <REPOSITORY>
Path to repository to operate on
By default, Jujutsu searches for the closest .jj/ directory in an ancestor of the current
working directory.
--ignore-working-copy
Don't snapshot the working copy, and don't update it
By default, Jujutsu snapshots the working copy at the beginning of every command. The
working copy is also updated at the end of the command, if the command modified the
working-copy commit (`@`). If you want to avoid snapshotting the working copy and instead
see a possibly stale working-copy commit, you can use `--ignore-working-copy`. This may be
useful e.g. in a command prompt, especially if you have another process that commits the
working copy.
Loading the repository at a specific operation with `--at-operation` implies
`--ignore-working-copy`.
--ignore-immutable
Allow rewriting immutable commits
By default, Jujutsu prevents rewriting commits in the configured set of immutable commits.
This option disables that check and lets you rewrite any commit but the root commit.
This option only affects the check. It does not affect the `immutable_heads()` revset or
the `immutable` template keyword.
--at-operation <AT_OPERATION>
Operation to load the repo at
Operation to load the repo at. By default, Jujutsu loads the repo at the most recent
operation, or at the merge of the divergent operations if any.
You can use `--at-op=<operation ID>` to see what the repo looked like at an earlier
operation. For example `jj --at-op=<operation ID> st` will show you what `jj st` would
have shown you when the given operation had just finished. `--at-op=@` is pretty much the
same as the default except that divergent operations will never be merged.
Use `jj op log` to find the operation ID you want. Any unambiguous prefix of the operation
ID is enough.
When loading the repo at an earlier operation, the working copy will be ignored, as if
`--ignore-working-copy` had been specified.
It is possible to run mutating commands when loading the repo at an earlier operation.
Doing that is equivalent to having run concurrent commands starting at the earlier
operation. There's rarely a reason to do that, but it is possible.
[aliases: --at-op]
--debug
Enable debug logging
--color <WHEN>
When to colorize output
[possible values: always, never, debug, auto]
--quiet
Silence non-primary command output
For example, `jj file list` will still list files, but it won't tell you if the working
copy was snapshotted or if descendants were rebased.
Warnings and errors will still be printed.
--no-pager
Disable the pager
--config <NAME=VALUE>
Additional configuration options (can be repeated)
The name should be specified as TOML dotted keys. The value should be specified as a TOML
expression. If string value isn't enclosed by any TOML constructs (such as array
notation), quotes can be omitted.
--config-file <PATH>
Additional configuration files (can be repeated)# Jujutsu (jj) Version Control **Version:** 0.35.0 (as of March 2026) > **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. ## Key Differences from Git - Working copy is automatically snapshotted on every command - No staging area - all changes are part of the working copy commit - Commits are identified by change IDs (stable) and commit IDs (change with rewrites) - The `@` symbol refers to the current working copy commit - `@-` refers to the parent of the working copy ## Common Commands ### Status and History ```sh jj status # Show working copy changes jj log # Show commit history jj log --limit 5 # Show last 5 commits jj diff # Show changes in working copy jj diff -r @- # Show changes in parent commit ``` ### Creating Commits ```sh jj commit -m "message" # Commit working copy with message jj describe -m "message" # Set/change description of current commit jj new # Create new empty commit on top of current jj new -m "message" # Create new commit with message ``` ### File Operations **IMPORTANT:** File operations use `jj file` subcommand, not top-level commands. ```sh jj file list # List tracked files jj file track <path> # Start tracking a file jj file untrack <path> # Stop tracking a file (keeps file on disk) jj file untrack 'glob/**' # Untrack files matching glob pattern ``` > **Gotcha:** There is no `jj untrack` - you must use `jj file untrack`. ### Restoring and Reverting ```sh jj restore <path> # Restore file to parent commit state jj restore --from @- <path> # Restore from specific revision ``` ### Branches and Bookmarks ```sh jj bookmark list # List bookmarks (jj's term for branches) jj bookmark create <name> # Create bookmark at current commit jj bookmark set <name> # Move bookmark to current commit ``` ### Working with History ```sh jj squash # Squash current commit into parent jj edit <revision> # Edit an earlier commit jj rebase -d <destination> # Rebase current commit onto destination ``` ## Commit Message Format Use heredoc for multi-line messages: ```sh jj commit -m "$(cat <<'EOF' Short summary line Longer description here. Can be multiple paragraphs. Co-Authored-By: Claude Opus 4.5 <[email protected]> EOF )" ``` ## Useful Revsets ```sh jj log -r @ # Current commit only jj log -r @- # Parent of current jj log -r @-- # Grandparent jj log -r "heads()" # All head commits jj log -r "root()..@" # All commits from root to current ``` ## Common Workflows ### Adding .gitignore After Build Artifacts Exist 1. Create `.gitignore` with patterns 2. Untrack the files that should be ignored: ```sh jj file untrack 'build/**' ``` 3. Commit the changes ### Fixing the Last Commit ```sh # Make changes to files, then: jj squash # Squash changes into parent # Or to change the message: jj describe -m "new message" ``` ## Tips - Use `--no-pager` flag to disable paging for scripted output - Use `-r` or `--revision` to specify which commit to operate on - Check `jj <command> --help` for detailed options - The working copy is always snapshotted automatically - no need to manually add files
File created successfully at: /Users/apanda/code/agent-spec-code/otp_test/.claude/skills/jujutsu.md
The user ran /usage which is a command to check usage. I should continue with my task - committing the jujutsu skills file.
jj commit -m "$(cat <<'EOF' Add Jujutsu skills file for Claude Code Documents jj 0.35.0 commands, especially the file untrack gotcha. Co-Authored-By: Claude Opus 4.5 <[email protected]> EOF )"
Working copy (@) now at: vrnpwopo 8feac23e (empty) (no description set) Parent commit (@-) : nxqszyrs 4a2eff26 Add Jujutsu skills file for Claude Code
The user seems to be checking commands. Let me show the log to confirm the commit.
@ vrnpwopo [email protected] 2026-03-07 10:08:09 8feac23e │ (empty) (no description set) ○ nxqszyrs [email protected] 2026-03-07 10:08:09 4a2eff26 │ Add Jujutsu skills file for Claude Code ○ ovlsvkqq [email protected] 2026-03-07 10:05:55 c5b91ac4 │ Add Gleam OTP skills file for Claude Code ○ mxqsznvz [email protected] 2026-03-07 10:03:36 9faa2cdb │ Implement distributed counter actors with eventual consistency ◆ zzzzzzzz root() 00000000
Created the jujutsu skills file and committed it. Let me summarize what I created.
Created .claude/skills/jujutsu.md with:
@ syntaxjj file untrack gotcha (not jj untrack)Committed as 4a2eff26.
In otp_test.gleam, what goes wrong if you use gleam/otp/process instead of gleam/erlang/process?
The user is asking about the difference between gleam/otp/process and gleam/erlang/process. Let me check if gleam/otp/process even exists, and what the differences are.
/Users/apanda/code/agent-spec-code/otp_test/build/packages/gleam_otp/src/gleam/otp/system.gleam /Users/apanda/code/agent-spec-code/otp_test/build/packages/gleam_otp/src/gleam/otp/port.gleam /Users/apanda/code/agent-spec-code/otp_test/build/packages/gleam_otp/src/gleam/otp/actor.gleam /Users/apanda/code/agent-spec-code/otp_test/build/packages/gleam_otp/src/gleam/otp/factory_supervisor.gleam /Users/apanda/code/agent-spec-code/otp_test/build/packages/gleam_otp/src/gleam/otp/static_supervisor.gleam /Users/apanda/code/agent-spec-code/otp_test/build/packages/gleam_otp/src/gleam/otp/supervision.gleam
/Users/apanda/code/agent-spec-code/otp_test/build/packages/gleam_erlang/src/gleam/erlang/application.gleam /Users/apanda/code/agent-spec-code/otp_test/build/packages/gleam_erlang/src/gleam/erlang/reference.gleam /Users/apanda/code/agent-spec-code/otp_test/build/packages/gleam_erlang/src/gleam/erlang/port.gleam /Users/apanda/code/agent-spec-code/otp_test/build/packages/gleam_erlang/src/gleam/erlang/charlist.gleam /Users/apanda/code/agent-spec-code/otp_test/build/packages/gleam_erlang/src/gleam/erlang/node.gleam /Users/apanda/code/agent-spec-code/otp_test/build/packages/gleam_erlang/src/gleam/erlang/atom.gleam /Users/apanda/code/agent-spec-code/otp_test/build/packages/gleam_erlang/src/gleam/erlang/process.gleam
There is no gleam/otp/process module - only gleam/erlang/process. The gleam_otp package has modules like actor, system, port, etc., but no process module. So if you tried to use gleam/otp/process, you'd get a compile error saying the module doesn't exist.
Let me verify this by checking the otp_test.gleam file and see what it imports.
There is no gleam/otp/process module - it doesn't exist. The gleam_otp package contains:
- gleam/otp/actor
- gleam/otp/system
- gleam/otp/port
- gleam/otp/supervision
- gleam/otp/static_supervisor
- gleam/otp/factory_supervisor
The process module lives in gleam_erlang as gleam/erlang/process.
If you tried to import gleam/otp/process, you'd get a compile error:
error: Unknown module
┌─ src/otp_test.gleam:4:1
│
4 │ import gleam/otp/process
│ ^^^^^^^^^^^^^^^^^^^^^^^^
No module has been found with the name `gleam/otp/process`.
The gleam/erlang/process module provides the core process primitives like Subject, send, send_after, sleep, and call that are needed for actor communication. The gleam/otp/actor module builds on top of these primitives to provide the higher-level actor abstraction.