logicsrc/docs/credential-sharing.md

# Credential Sharing OpenSpec

Status: reference implementation available (`@logicsrc/plugin-credential-sharing`)

Slug: `credential-sharing`

## Reference Implementation

The spec below is implemented by `plugins/credential-sharing` and surfaced through
`logicsrc credentials <command>`. All four first providers (`env`, `doppler`,
`railway`, `github-secrets`) ship as provider adapters.

```bash
# List adapters and their capabilities (which can read values vs. write-only)
logicsrc credentials providers

# Inspect an endpoint — redacted key names + value fingerprints, never raw values
logicsrc credentials inspect --provider env --path .env

# Diff a source against a target without moving anything
logicsrc credentials diff --from env --from-path .env --to railway \
  --to-project <projectId> --to-config <environmentId>

# Build a plan (stored under .logicsrc/credentials), then dry-run, then apply
logicsrc credentials plan --from env --from-path .env --to doppler \
  --to-project <project> --to-config <config>
logicsrc credentials sync --plan <planId>            # dry-run (no writes)
logicsrc credentials sync --plan <planId> --approve  # writes to the target

# Audit and reverse a run (rollback emits a NEW plan)
logicsrc credentials audit --run <runId> --format markdown
logicsrc credentials rollback --run <runId>
```

SDK usage mirrors the spec via `createCredentialEngine()` from the plugin package.

Implementation notes:
- Value fingerprints are salted SHA-256 (truncated) so two endpoints can be diffed
  without revealing values; they are equality/integrity markers, not secret storage.
- `github-secrets` is write-only for values (GitHub never returns secret values), so
  it cannot be a sync source or a value-restoring rollback target. Secret writes are
  libsodium sealed-box encrypted against the repo/org/environment public key.
- Rollback captures the target's prior values into a 0600 vault under `.logicsrc/`
  (gitignored) — the only place raw values touch disk. Plans, runs, and audit records
  contain fingerprints only.

Credential Sharing is a LogicSRC OpenSpec for portable, auditable secret synchronization across local files and infrastructure providers. It is intended to replace closed, proprietary credential-sharing workflows with a provider-neutral contract.

LogicSRC defines the open objects, CLI commands, SDK calls, TUI states, PWA states, provider adapter capabilities, and audit records. External products may consume this contract, but LogicSRC does not call out to product-specific commands.

## First Providers

```txt
env
doppler
railway
github-secrets
```

- `.env`: read, diff, redact, and write local environment files.
- Doppler: sync project/config scoped secrets.
- Railway: sync service variables.
- GitHub Secrets: sync repository, organization, and environment secrets.

## Core Objects

```txt
credential_provider
credential_source
credential_target
credential_key
credential_fingerprint
credential_policy
credential_diff
credential_sync_plan
credential_sync_run
credential_approval
credential_rollback
credential_audit_event
```

## CLI Spec

Command namespace:

```bash
logicsrc credentials <command>
```

Required commands:

```txt
providers
inspect
plan
diff
approve
sync
rollback
audit
export
```

Examples:

```bash
logicsrc credentials providers
logicsrc credentials plan --from env --to railway
logicsrc credentials plan --from doppler --to github-secrets
logicsrc credentials diff --from env --to doppler --redact
logicsrc credentials sync --plan cred_plan_123 --approve
logicsrc credentials audit --run cred_run_123 --format markdown
```

## Security Rules

- Raw secret values must never be printed by default.
- Audit logs should store key names, targets, timestamps, actor identity, and value fingerprints, not raw values.
- Every write operation should support dry-run mode.
- Provider adapters must declare read/write capabilities before a plan is generated.
- Destructive changes require explicit approval.
- Rollbacks must be represented as new sync plans rather than hidden mutation history.

## SDK Spec

All SDKs should expose the same conceptual API:

```txt
listCredentialProviders()
inspectCredentialSource(source)
createCredentialSyncPlan(input)
diffCredentialTargets(planId)
approveCredentialSync(planId, approval)
runCredentialSync(planId)
rollbackCredentialSync(runId)
exportCredentialAudit(runId)
```

## Provider Adapter Contract

Provider adapters implement the LogicSRC credential provider contract:

```txt
provider.id
provider.capabilities
provider.auth_requirements
provider.inspect()
provider.diff()
provider.write()
provider.rollback()
provider.audit()
```

The adapter boundary lets tools such as a PWA, TUI, CI workflow, or external CLI consume the same open standard without making LogicSRC depend on any specific product.

## Team Sharing (end-to-end encrypted)

The `team` provider adds a fifth endpoint type — a hosted, **end-to-end-encrypted**
team vault — so you can share credentials with teammates by email instead of
passing `.env` files over chat. It is addressed as `team:<team-slug>/<vault-name>`
(`endpoint.project` = team slug, `endpoint.config` = vault name).

### Trust model

The server (`commandboard-api`, routes under `/api/credshare`) is a **zero-knowledge
relay for secret values**. It stores only:

- member identity **public keys** (X25519),
- the vault **data-encryption key (DEK) sealed to each member's public key**
  (`crypto_box_seal`), one wrapped copy per member,
- secret **ciphertext + nonce** (`crypto_secretbox`), plus a salted fingerprint
  for redacted diffs.

Plaintext secret values and the raw DEK never leave a member's machine. Granting a
teammate access = an existing member unwraps the DEK with their private key and
re-wraps (seals) it to the new member's public key. The private key lives only in
`~/.logicsrc/identity.json` (mode 0600) and is never uploaded.

### CLI

```bash
# One-time: log in through your browser (registers this device's identity key).
logicsrc login

# Owner: create a team, push a local .env into an encrypted vault, invite people.
logicsrc teams create acme --name "Acme Inc"
logicsrc teams push acme prod --env .env        # encrypt + upload
logicsrc teams invite acme teammate@example.com # emails an accept link

# Teammate: accept, then get granted, then pull + decrypt locally.
logicsrc login
logicsrc teams accept <token-from-email>
# …an existing member runs:  logicsrc teams grant acme prod teammate@example.com
logicsrc teams pull acme prod --env .env        # download + decrypt

# Inspect / manage
logicsrc teams list
logicsrc teams members acme
logicsrc teams vaults acme
```

`logicsrc login` picks its flow from the machine it runs on:

- **Has its own browser** → loopback OAuth-PKCE: a `127.0.0.1` listener catches
  the callback. Force it with `--web`.
- **No browser** (SSH, droplet, container, CI) → device authorization: the CLI
  prints a short code, you approve it from a browser on any other machine.
  Force it with `--device`. A loopback redirect would be useless here — the
  browser's `127.0.0.1` is not the CLI's machine.
- **Unattended** → `--token lsk_…` from **Settings ▸ API keys**.

It talks to the hosted credentials app by default. Point it elsewhere (local dev,
self-hosted) with `LOGICSRC_API=http://localhost:8080 logicsrc login` or
`logicsrc login --api-url …`; the chosen origin is remembered in
`~/.logicsrc/identity.json` once login succeeds.

Because `team` is a normal provider, the generic sync surface works too — e.g.
`logicsrc credentials plan --from env --from-path .env --to team --to-project acme
--to-config prod`, then `diff`, `sync`, `audit`, and `rollback` behave exactly as
with the other providers.

### Server + web

- Server storage is behind a `CredShareStore` interface: an in-memory store for
  local dev/tests, and a Supabase-backed store (`SUPABASE_URL` +
  `SUPABASE_SERVICE_ROLE_KEY`) for production. Migration:
  `supabase/migrations/*_credshare.sql` (deny-by-default RLS).
- Email (login codes + invites) uses Resend when `RESEND_API_KEY` is set; without
  it, codes/tokens are returned in the API response for local use.
- `logicsrc.com/teams` is a management surface only: log in by email, view
  teams/members/vaults and invite/accept. The browser holds no private key, so it
  never decrypts — decryption happens only in the CLI.