ThreadPort
Find unfinished AI coding tasks, review their evidence, and prepare a continuation with Claude or Codex.
GitHub stable release 0.2.1 is available from the v0.2.1 Release. npm publication is pending authentication; install the attached GitHub asset rather than using npm install threadport. Real Agent/platform certification and external user validation remain pending. See the release verification record.
This repository contains the first implementation of the ThreadPort Context Capsule v1 format. A Capsule records observable work state — objective, decisions, files, commands, tests, Git identity, evidence, and the next action — so a task can move between Claude Code, Codex, Cursor, and Gemini without copying hidden reasoning or silently executing code.
Current implementation
The development checkout includes a task inbox, searchable history, manual revision controls, a complete continuation preview and terminal confirmation. The v0.2 documentation distinguishes implemented behavior from remaining acceptance gates. Capsule v1 and the legacy artifact CLI remain available.
With Node 24, try the current checkout:
npm ci
npm run build
node dist/src/cli.js ui --no-open
- Open the loopback link printed in your terminal. Add an explicit workspace and source directory in Settings.
- Refresh the source, find a session in History and create or attach a task. Review observed evidence and confirm your objective and constraints.
- Prepare a continuation, read the complete text, then copy the fixed ThreadPort command to a terminal. The terminal asks for confirmation before launching a compatible installed Agent.
Without local logs, node dist/src/cli.js ui --demo --no-open opens synthetic data. Demo is not real continuation evidence. No account or telemetry is required by ThreadPort. Agent authentication belongs to your existing installation.
- JSON Schema:
schema/capsule-v1.schema.json
- TypeScript validator and serializer:
src/capsule.ts
- Readable Markdown renderer:
src/markdown.ts
- Git state model and dirty-diff hash:
src/git.ts
- Secret redaction:
src/redact.ts
- Example Capsule:
examples/capsule-v1.json
Run
npm ci
npm run check
Requires Node >=24.0.0 for this v0.2 development checkout. CI runs Node 24. See runtime and storage migration. Session adapters and the handoff CLI are available. Processing is local-only: source sessions and project contents are read, while exported artifacts are written to explicit or temporary destinations. See CONTRIBUTING.md for branch names, pull requests, and the quality gate.
import { createClaudeAdapter, createCodexAdapter, createCursorAdapter, createGeminiAdapter } from "threadport";
const capsule = await createGeminiAdapter().extract({
sessionPath: "./tests/fixtures/gemini/session-basic.json",
project: { name: "my-app", root: process.cwd() }
});
createClaudeAdapter, createCodexAdapter, and createCursorAdapter take the same input. Pass a local session file or already-read text. Adapters map observable traces onto Capsule v1; they do not execute next_action, and they do not treat the session file as a published vendor schema.
Handoff CLI
Local artifact commands. After npm run build, invoke the built CLI directly:
node dist/src/cli.js extract --from claude --session ./session.jsonl --project .
node dist/src/cli.js validate /path/printed/by/extract.json
node dist/src/cli.js render /path/printed/by/extract.json
node dist/src/cli.js handoff --to codex /path/to/capsule.json --format json --out ./handoff.json
node dist/src/cli.js validate --handoff ./handoff.json
node dist/src/cli.js targets
The CLI validates before writing and does not run next_action. --from accepts claude, codex, cursor, and gemini. After installing a built package, threadport is the equivalent executable. Do not use npx threadport as a substitute for building this checkout: it can resolve a registry package.
Output and privacy contracts
- Default output is under the operating-system temporary directory, in a user-specific
threadport-* directory, outside the source project. The namespace includes the canonical local project path hash and source agent; session IDs are scoped to this namespace. It is not a global cross-device repository identifier. Temporary artifacts may be cleaned by the OS; choose --out outside the project for durable storage.
- The CLI prints successful output paths.
--out selects an explicit destination; no file is replaced without --force. JSON is authoritative. Markdown is a rebuildable cache: a cache failure after JSON publication emits a warning and retains the saved JSON. This is not a two-file transaction.
- Portable mode is the default for every adapter. Nested repository paths stay relative; external filesystem paths receive opaque
external/<hash> locators. These hashes are identifiers, not encryption. Recognizable complete paths in display text use the same containment checks, including sibling-name prefixes, traversal and quoted paths containing spaces. Source-aware normalization uses explicit POSIX or Windows rules. Windows drive-relative paths (such as C:notes.txt), paths without a drive, device namespaces, and paths with an unknown source root receive opaque locators. External relative locators include their source-root context, so they may differ from earlier exports. Relative SDK session-file locators are resolved from the same working directory used to read them. Path extraction from arbitrary prose remains heuristic. Use --privacy local or SDK privacy: 'local' only when retaining local paths is intentional.
- Command attempts remain chronological. A successful retry resolves only earlier failures with the same session, observed cwd, and exact command text; missing cwd stays unknown and never matches a known cwd. Redacted command/cwd identities cannot establish a successful retry. Explicit null exit codes stay unknown. Conventional direct npm/pnpm/yarn and supported test-runner invocations are classified as tests; unrecognized commands and shell compositions remain general commands. A legacy extraction accepts one session identity; split concatenated sessions into separate inputs.
- The latest visible user message supplies a derived objective candidate, which may only be a follow-up; confirm it before continuing. Earlier user messages and assistant plans remain message evidence, not adopted decisions. Chinese and English prohibition lines are retained as candidate constraints. Historical test results keep their observed outcome and explicitly mark current workspace validity unknown. Capsule v1 fields are unchanged. The internal task model preserves saved manual fields during derivation; persistent revision-checked editing is available in the local workbench.
- Complete visible record strings are secret-redacted before summaries are truncated. Metadata also passes an output privacy boundary. Secret scanning is heuristic, not a guarantee that arbitrary credentials, encoded secrets, or personal information have been removed. Inspect artifacts before sharing.
- File tool calls without a recognized successful result remain attempts, not completed work. Unsupported/empty session formats are rejected. The adapters support the observed fixture formats, not every vendor version; result IDs are used where available, and ambiguous ID-less concurrent Gemini results remain unknown. See compatibility evidence: Cursor has a narrowly tested transcript-only import; no live vendor version has full tool-evidence certification.
Cursor Copy Transcript (limited import)
Cursor 3.20.10, Agents / This Mac, Chat actions → Copy → Copy Transcript was tested on macOS 26.6.2. Save the copied text as UTF-8 plain text (.txt or .md), then use the same extraction command:
node dist/src/cli.js extract --from cursor --session /path/to/cursor-transcript.txt --project /path/to/project --out /path/outside/project/capsule.json
The observed export is Markdown, not JSONL. It omits complete structured tool results. ThreadPort therefore imports it as transcript-only, writes a warning to stderr and into Capsule constraints, and sets status: paused. Visible user instructions and the latest visible assistant context are retained for review; assistant context is explicitly unverified. files, commands, tests, failures, completed and decisions remain empty. Current Git changes are independently recorded under git, not attributed to the session.
This narrow parser recognizes a title and ## User / ## Assistant sections. Fenced/indented code, quoted lines, tool bodies, hidden sections and unsupported sections are conservatively omitted; empty-user and unclosed-fence inputs fail. Markdown headings cannot authenticate roles and literal, unfenced role-like headings are ambiguous. Review the original export before acting. Long assistant review context is capped at 4,000 characters after secret redaction and explicitly marked when truncated. This is not lossless conversation migration, historical Git reconstruction or a promise of Cloud/IDE/CLI compatibility.
Structured JSON/JSONL inputs follow the shared evidence rules: objectives are candidates from the latest visible user message; command outcomes are scoped to the observed session, exact command and working directory. Structured command events recognize direct node --test / node.exe --test invocations (including following file arguments), not shell compositions; this does not recover missing test evidence from Markdown summaries.
Cursor's project-local native JSONL can also omit call IDs/results. Those sessions now warn about incomplete evidence, retain attempted operations as unknown and preserve the latest review instruction. An existing confirmed failure stays blocked; otherwise incomplete sessions are paused. Native timestamp/user-query wrappers are removed from the objective, not mistaken for task text. Blank or duplicated call IDs, or results preceding their calls, cannot supply a successful outcome.
For explicitly permitted single-session database evidence, a developer-only read-only exporter is available; see Cursor evidence verification. It is experimental, requires the SQLite CLI, is not included in the npm package and does not discover sessions automatically. This richer path has been checked against the isolated test session, but does not certify every tool or release.
Allowed Claude source discovery
The v0.2 threadport/sources SDK exposes createSourceRegistry and createClaudeSource. Configure explicit roots and a sourceId; the adapter never discovers roots from HOME. Iterate discover(roots, signal), then call read({candidate, cursor, maxEvents, signal}), persisting its whole cursor. Continue while hasMore is true, including pages with zero events. Inspect warnings for partial lines, limits and reset requirements. The old extract API is unchanged. See native source compatibility and limits; indexing is available through IndexService; the local workbench configures sources explicitly.
Incremental indexing
threadport/sources now registers Claude and Codex. threadport/indexing provides IndexService for manual refresh, cancellation and optional 15-second refresh while a local service runs. Full cursors and event batches commit atomically; rescans preserve manual tasks and links. Database schema v2 adds durable cursor state and two scan lease slots. See indexing and recovery and Codex format evidence.
Git fingerprints and handoff boundary
Snapshots distinguish HEAD-to-index, index-to-worktree, and untracked contents, including symlinks as links. They use a new domain-separated hash algorithm, so capsules exported by the old incomplete algorithm must be re-extracted before comparing. No Capsule v1 fields were added. Git output is capped at 32 MiB per command with a 30-second timeout; aggregate untracked regular-file content is capped at 64 MiB. Ignore generated data before extraction. Snapshot consistency checks are best-effort; no repository lock or atomic filesystem snapshot is claimed.
gitStateMatches compares work state, not repository identity. A portable root: '.' does not fail solely because the local path differs. Consumers must independently bind the intended repository before using this result; matching hashes alone do not authorize edits.
handoff exports Markdown (.md) or a strict threadport.handoff.v1 envelope. The public createHandoff, parseHandoff, and handoffSchema APIs and schema/handoff-v1.schema.json define this envelope. Register schema/capsule-v1.schema.json with offline JSON Schema validators to resolve its reference. Consumers must validate both the envelope and capsule. Safety flags declare a no-execution workflow; they are not a sandbox.
targets only locates candidates using PATH/PATHEXT. It does not run agents or lookup utilities. Every candidate reports launch_supported: false; existence does not establish vendor identity or a compatible CLI version. The old suggestedLaunch API now rejects automatic launching rather than returning an unverified shell command. The new continue command requires an immutable task handoff and explicit terminal confirmation; there is no automatic launch or apply mode.
Release verification
npm ci
npm run check
npm run check:pack
npm audit
npm pack builds through prepack; only runtime build files, SQL migrations, schemas, examples and package documentation are distributed. check:pack installs the tarball into an isolated directory and checks the CLI, public exports and native SQLite creation. CI runs these gates on Ubuntu, macOS and Windows with Node 24. The Git regression suite requires real file symlinks on every platform, including Windows; missing privileges fail the test instead of skipping it. Parsed Markdown assertions cover LF/CRLF/CR, and publication tests inject filesystem errors after preflight. Vitest 4.1.11 and Vite 6.4.3 are pinned together to fix the mocker advisory without unrelated dependency upgrades.
Safety boundary
ThreadPort does not transfer hidden chain-of-thought, does not upload session data, and does not automatically run the next action. Consumers must validate the Capsule and ask for user confirmation before modifying a repository.
Editable tasks SDK
The threadport/tasks entry supports manual task fields, revision conflicts, session associations and reversible lifecycle/archive changes. See task management for redaction preview, project boundaries and completion activity semantics. The local workbench includes these editing controls.
History search SDK
Use threadport/search to find Chinese substrings, English text, relative paths and manual task titles/objectives with project, agent and UTC date filters. History search documents bounded snippets, keyset pagination and explicit refresh when indexed data changes.
Workspace snapshot SDK
threadport/workspace captures and persists bounded, read-only snapshots of an explicitly selected local worktree. Snapshot documentation describes content and identity digests, incomplete capture reasons and cancellation. It also exposes verifyWorkspace for explicit comparison. Run threadport verify capsule.json --project /absolute/project [--data-dir /private/data] [--json]: matched exits 0, drifted 4, unverifiable 6; input errors exit 2 and IO failures 5. Legacy Capsules without an explicit saved-snapshot evidence reference return unverifiable. validate remains schema-only. See the snapshot documentation for the reference protocol and SDK producer example; a match does not certify historical tests.
threadport/server now exposes startLocalServer({dataDir?}) for a protected loopback service and authenticated GET /api/v1/status. The server returns an in-memory token and an idempotent close() that stops indexing before closing the database. See local server documentation. Business routes and the ui CLI are available.
Start the local entry page with threadport ui --no-open, or use threadport ui --demo --no-open for isolated synthetic data. Open the printed fragment-token link; refreshing requires reopening the current terminal link. The offline workbench configures sources, finds history, edits revision-checked tasks, and previews the complete transfer text before generating a terminal command. You can paste the current terminal link to reconnect while keeping search filters. Ctrl-C stops the service.
Prepare a task continuation with threadport prepare --task <id> --source-session <id> --to claude|codex --workspace <id>, then run threadport continue --handoff <uuid> in your terminal (use the same optional --data-dir for both). Continue displays the complete context, target and workspace, requires typing CONTINUE, verifies again, and claims the handoff once before inheriting the terminal. Non-TTY use and --yes are rejected. Target nonzero exits are recorded separately and return CLI exit 5; a clean process exit does not mark the task complete. See the version matrix and local workflows. Real cross-Agent certification is still pending; the workbench uses synthetic browser acceptance; actual vendor certification remains separate.
Prepared handoffs now assess each recorded command against its own historical workspace snapshot. Changed code marks a known historical outcome stale; the original exit code stays intact. Missing snapshot or environment evidence stays unknown, and incomplete execution evidence stays unverified. Native logs currently lack historical snapshot bindings, so they do not gain current test certification. Aggregate warnings include older commands whose excerpts were omitted. Required context that exceeds 32 KiB returns CONTEXT_BUDGET_EXCEEDED (HTTP 422 / CLI exit 2), without truncating constraints. See the evidence decision and report-to-code audit.
Bundled browser dependency notices are included in THIRD_PARTY_NOTICES.md.
See the current remediation record for exact commits and checks. Terminal consent binds a frozen launch plan: canonical executable identity, version, argv, cwd, context transport, expiry and nonce. These are checked again before one-use consumption. Inherited Agent settings/interpreters and the final filesystem-to-exec race remain outside complete control.
Runs sharing one application data directory reserve the canonical workspace across processes and handoffs. Independent data directories do not coordinate; concurrent use of the same workspace through multiple stores is unsupported. Lost observers retain an unknown reservation. Use threadport inspect-run --handoff <uuid> and, only after checking the target has stopped, threadport recover-run --handoff <uuid> with the same data directory. Recovery requires a terminal and the displayed RELEASE <nonce> phrase, records the evidence and does not retry the consumed handoff. Schema 7 includes the additive runtime, assertion and execution-observation migrations; older binaries refuse the upgraded database.
Workbench snapshots use raw.v2 / scope.v1: sensitive filenames are excluded before content reads, incomplete captures block preparation, and ignored path counts are visible. Internal leaf symlinks contribute link text only. External links, submodules, non-UTF8 paths and unborn repositories cannot produce a complete snapshot. Older scope versions cannot match new captures. See the reading policy; its filename heuristic does not detect every secret, and legacy artifact extraction has a separate boundary.
Reviewed decisions and conflicts
The task workbench now keeps an immutable decision/constraint history. Save suggestions as candidates, explicitly confirm an entry, and select the entries it replaces. Different confirmed choices for the same topic and overlapping scope are shown as conflicts; you can also mark a conflict across topics. Resolve conflicts before preparing continuation. A concurrent save keeps your draft and offers an explicit baseline refresh. Missing source evidence is labeled unavailable without erasing your confirmation. See the assertion decision and current verification record above.
ThreadPort captures the observable work state of an AI coding session — objective, decisions, files, commands, tests, Git state, evidence and next action — into a portable 'Capsule' file, so you can review what happened and hand off an unfinished task between Claude Code, Codex, Cursor, or Gemini.