Local context manager for Claude Code and Codex.

Keep exact conversation bindings, resume work cleanly, branch context without mixing streams, and optionally inspect saved workstreams in a local browser frontend.

Claude Code chat          Codex chat
      |                      |
      v                      v
   /ctx ...               ctx ...
          \              /
           v            v
      +----------------------+
      | workstream: feature-audit |
      |   claude:  abc123    |
      |   codex:   def456    |
      +----------------------+
                 |
                 +--> feature-audit-v2 branch

• Exact transcript binding: each internal ctx session can bind to the exact Claude and/or Codex conversation it came from.
• No transcript drift: later pulls stay on that bound conversation instead of jumping to the newest chat on disk.
• Safe branching: start a new workstream from the current state of another one without sharing future transcript pulls or hijacking the source conversation.
• Indexed retrieval: saved workstreams, sessions, and entries are indexed for fast ctx search lookup.
• Curated loads: pin saved entries so they always load, exclude saved entries so they stay searchable but stop getting passed back to the model, or delete them entirely.
• Local-first: no API keys, no hosted service, plain SQLite plus local files.

Clone the repo and do the standard project-local setup:

git clone https://github.com/dchu917/ctx.git
cd ctx
./setup.sh

This is the main development-friendly install path.

It does the following:

• creates ./.contextfun/context.db
• writes ./ctx.env
• installs a repo-backed ctx shim into ~/.contextfun/bin
• links local skills into ~/.claude/skills and ~/.codex/skills

Use this when:

• you want the repo checked out locally
• you want ctx to use a project-local DB by default
• you are developing or editing the repo itself

1. Clone and set it up:

git clone https://github.com/dchu917/ctx.git
cd ctx
./setup.sh

2. Start a new workstream:

Claude Code:

/ctx start feature-audit --pull

Codex or your terminal:

ctx start feature-audit --pull

3. Know what --pull means:

• ctx start feature-audit --pull creates the workstream and pulls the existing context from the current conversation into it.
• ctx start feature-audit creates the workstream starting from that point only. It does not backfill the earlier conversation.

4. Come back later and continue or branch:

Claude Code:

/ctx resume feature-audit
/ctx branch feature-audit feature-audit-v2

Codex:

ctx resume feature-audit
ctx branch feature-audit feature-audit-v2

Claude Code:

• /ctx: show the current workstream for this repo, or tell you that none is set yet.
• /ctx list: list saved workstreams, with this repo first when applicable.
• /ctx search dataset download: search saved workstreams and entries for matching context.
• /ctx start my-stream --pull: create a new workstream and pull the existing context from the current conversation into it before continuing.
• /ctx resume my-stream: continue an existing workstream and append new context from this conversation to it.
• /ctx rename better-name: rename the current workstream.
• /ctx rename better-name --from old-name: rename a specific workstream without switching to it first.
• /ctx delete my-stream: delete the latest saved ctx session in that workstream.
• /ctx curate my-stream: open the saved-memory curation UI for that workstream.
• /ctx branch source-stream target-stream: create a new workstream seeded from the current saved state of another one.
• /branch source-stream target-stream: Claude shortcut for the same branch operation.

Codex:

• ctx: show the current workstream for this repo, or tell you that none is set yet.
• ctx list: list saved workstreams.
• ctx list --this-repo: list only workstreams linked to the current repo.
• ctx search dataset download: search saved workstreams and entries for matching context.
• ctx search dataset download --this-repo: search only workstreams linked to the current repo.
• ctx web --open: open the optional local browser UI for browsing, searching, and copying continuation commands.
• ctx start my-stream: create a new workstream starting from this point only.
• ctx start my-stream --pull: create a new workstream and pull the existing context from the current conversation into it first.
• ctx resume my-stream: continue an existing workstream.
• ctx resume my-stream --compress: continue an existing workstream with a smaller load pack.
• ctx rename better-name: rename the current workstream.
• ctx rename better-name --from old-name: rename a specific workstream without switching to it first.
• ctx delete my-stream: delete the latest saved ctx session in that workstream.
• ctx curate my-stream: open the saved-memory curation UI for that workstream.
• ctx branch source-stream target-stream: create a new workstream seeded from the current saved state of another one.

Codex note:

Codex does not currently support repo-defined custom slash commands like /ctx list, so in Codex you should use the installed ctx command with subcommands. When ctx start, ctx resume, or ctx branch load context, they print a short summary of what the workstream is, the latest session being targeted, and the most recent items. They also include an explicit hint that in Codex you can inspect the full command output with ctrl-t, and in Claude you can expand the tool output block, plus guidance for the agent to summarize briefly and ask how you want to proceed instead of pasting the full pack back.

git clone https://github.com/dchu917/ctx.git
cd ctx
./setup.sh --global

This runs the same quickstart entrypoint, but installs the pinned global release into ~/.contextfun instead of wiring the current clone as the live runtime.

curl -fsSL https://raw.githubusercontent.com/dchu917/ctx/main/scripts/install.sh | bash

This installs a pinned tagged release into ~/.contextfun, including the ctx binary, the Python package, the default DB, and the self-contained Claude/Codex skills.

npx skills add https://github.com/dchu917/ctx --skill ctx -y -g

This installs the ctx bootstrap skill first, not the CLI binary directly. After that, the bundled skills/ctx/scripts/ctx.sh wrapper can run ctx install or auto-install the global CLI into ~/.contextfun on first use.

Global shell bootstrap:

source <(curl -fsSL https://raw.githubusercontent.com/dchu917/ctx/main/scripts/agent_bootstrap.sh)

Project-local shell bootstrap:

source <(curl -fsSL https://raw.githubusercontent.com/dchu917/ctx/main/scripts/agent_setup_local_ctx.sh)

These are best for Claude Code or Codex terminals.

Repo-backed ctx shim:

bash scripts/install_shims.sh

Skill links only:

bash scripts/install_skills.sh

Override skill directories if needed:

CODEX_SKILLS_DIR=/custom/codex/skills \
CLAUDE_SKILLS_DIR=/custom/claude/skills \
bash scripts/install_skills.sh

Use ctx curate <workstream> to review the saved entries that feed future loads for a workstream:

The terminal UI lets you scroll saved entries, inspect a preview, and change how each entry behaves in future packs:

• j / k or arrow keys move through entries
• Enter toggles a larger preview
• p pins an entry so it always loads, even in compressed mode
• x excludes an entry from future loads, but keeps it saved and searchable
• a restores the default load behavior
• d marks an entry for deletion, then y confirms the delete
• q exits

Notes:

• This changes ctx memory only. It does not edit or delete the original Claude/Codex chat.
• If you are in a non-interactive shell, use ctx web --open and manage entries from the browser detail page instead.
• ctx delete --interactive <workstream> opens the same curation UI.
• See docs/usage.md and docs/architecture.md for deeper detail on load controls.

Use ctx clear to delete whole workstreams together with their linked sessions and saved entries:

ctx clear --this-repo --yes
ctx clear --all --yes

Notes:

• --this-repo deletes only workstreams linked to the current repo.
• --all deletes workstreams across the entire current ctx DB.
• --yes is required for the actual delete. Without it, ctx prints what would be removed and exits without deleting anything.
• This clears ctx-managed memory, attachments, and current-workstream pointers for the deleted workstreams. It does not delete the original Claude/Codex chat files.

ctx is a context layer, not a sandbox. See SECURITY.md for the threat-model summary and docs/maintenance.md for operational notes.

Do I need API keys?

Can multiple repos share the same context DB?

• Yes. Set ctx_DB to a shared path such as ~/.contextfun/context.db.

Does deleting a ctx session delete the actual Claude/Codex chat?

• No. It only deletes the internal ctx session and its stored attachments.

MIT. See LICENSE.