WIP: PRD: Per-bottle signed commits & audit attribution #480

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didericis-claude wants to merge 4 commits from prd-forge-subroles into main
Collaborator

Formalizes the design settled in #423 into a PRD-only PR for review — no code changes, just docs/prds/prd-new-forge-subroles.md (CI numbers it on merge).

What the PRD specifies

Forge subroles — one identity per bottled agent (author name/email + a forge subuser account + a single SSH signing key), reused across every repo and forge that bottle touches.

  • Vouched attribution via sign-at-commit-time in the git-gate boundary: the sidecar runs an ssh-agent holding the short-lived signing key and only SSH_AUTH_SOCK is forwarded into the bottle. Private key never enters the bottle; commit SHAs never diverge from the signed upstream.
  • Forge "Verified" badges abandoned (ephemeral + Gitea couples signing keys to push access). Vouched-ness carried by local git verify-commit plus a durable console audit record and optional commit-status badges.
  • Reprovision-per-activation lifecycle (PRD 0048 discipline): signing key, forge-scoped API token (comment/issue/PR/label), and per-repo deploy keys minted host-side at spin-up, revoked fail-loud at teardown. Clean teardown assumed; dirty-teardown reconciliation deferred.
  • Audit trail on a bottled_agent-scoped table (PRD 0067 store): activation/deactivation cycles and retired keys, public-key fingerprint only — never private material.
  • Fail-closed provisioning: a bottle declaring a forge with no matching agent.forge-accounts entry refuses to launch.

Successor to PRD 0027 (claimed-not-vouched, ADR 0002) and PRD 0048 (host-side minting lifecycle).

Open questions flagged for review

  • author/forge-accounts top-level vs. nested under git-gate: (PRD 0047 consolidation).
  • Where the commit-status poster observes new SHAs (gate push-hook vs. poll).
  • GITEA_ADMIN_TOKENGITEA_MINT_TOKEN rename (least-privilege naming).
  • Fingerprint-only vs. full pubkey in the audit record (git verify-commit needs the full key).

Closes #423 once the design is accepted.

🤖 Generated with Claude Code

Formalizes the design settled in #423 into a PRD-only PR for review — no code changes, just `docs/prds/prd-new-forge-subroles.md` (CI numbers it on merge). ## What the PRD specifies **Forge subroles** — one identity per bottled agent (author name/email + a forge subuser account + a single SSH signing key), reused across every repo and forge that bottle touches. - **Vouched attribution** via sign-at-commit-time in the git-gate boundary: the sidecar runs an `ssh-agent` holding the short-lived signing key and only `SSH_AUTH_SOCK` is forwarded into the bottle. Private key never enters the bottle; commit SHAs never diverge from the signed upstream. - **Forge "Verified" badges abandoned** (ephemeral + Gitea couples signing keys to push access). Vouched-ness carried by local `git verify-commit` plus a durable console audit record and optional commit-status badges. - **Reprovision-per-activation lifecycle** (PRD 0048 discipline): signing key, forge-scoped API token (comment/issue/PR/label), and per-repo deploy keys minted host-side at spin-up, revoked fail-loud at teardown. Clean teardown assumed; dirty-teardown reconciliation deferred. - **Audit trail** on a `bottled_agent`-scoped table (PRD 0067 store): activation/deactivation cycles and retired keys, **public-key fingerprint only** — never private material. - **Fail-closed provisioning**: a bottle declaring a forge with no matching `agent.forge-accounts` entry refuses to launch. Successor to **PRD 0027** (claimed-not-vouched, ADR 0002) and **PRD 0048** (host-side minting lifecycle). ## Open questions flagged for review - `author`/`forge-accounts` top-level vs. nested under `git-gate:` (PRD 0047 consolidation). - Where the commit-status poster observes new SHAs (gate push-hook vs. poll). - `GITEA_ADMIN_TOKEN` → `GITEA_MINT_TOKEN` rename (least-privilege naming). - Fingerprint-only vs. full pubkey in the audit record (`git verify-commit` needs the full key). Closes #423 once the design is accepted. 🤖 Generated with [Claude Code](https://claude.com/claude-code)
Collaborator

I found three design issues that I think should be resolved before this PRD is accepted:

  1. The proposed least-privilege minting credential cannot mint a PAT for another Gitea user. Gitea creates PATs through POST /users/:name/tokens, and that endpoint requires Basic Auth as that user (password, plus OTP when enabled); a developer PAT cannot be scoped to "create/delete tokens for this subuser." The admin CLI can generate a token on behalf of a user, but that requires instance-admin/server access, which conflicts with the explicit non-admin goal. Please specify a viable bootstrap mechanism and custody model - for example, retain a long-lived subrole bootstrap secret host-side and use it to mint activation PATs, provision the activation credential out-of-band, or explicitly accept/administer an admin boundary. As written, implementation chunk 4 is not implementable against Gitea's documented API.

  2. Forwarding a raw ssh-agent socket does not cryptographically vouch the declared author identity. The bottle controls the complete bytes sent for signing, so it can produce a valid signature over a commit with any author/committer name, email, timestamp, tree, or parents. The sidecar holds the private key, but it neither constructs nor validates the commit; consequently the signature proves "this bottle had access to the activation signing capability," not that author.name/author.email is vouched. This contradicts the Summary, Success Criteria, and the claim that author/account/key are one enforced identity. Either narrow the claim to activation/bottle provenance, or put a validating signing broker in front of the key that parses the SSH signing request and enforces the permitted commit identity (and define how non-commit signing requests are rejected).

  3. A fingerprint-only audit row cannot support the promised post-teardown verification. git verify-commit for SSH signatures needs an allowed-signers file containing the full public key (and a principal); a SHA256 fingerprint is not verification material. Merely "having the public key" is also insufficient unless gpg.ssh.allowedSignersFile and the principal mapping are defined. This is currently both an open question and a direct contradiction between the success criteria ("against the retained public key") and the durable-audit requirement ("fingerprint only"). Please resolve it in the design: retain the full public key plus its fingerprint and principal/validity interval, and specify how the verifier material/allowed-signers file is produced. The illustrative schema should reflect that source of truth.

I found three design issues that I think should be resolved before this PRD is accepted: 1. **The proposed least-privilege minting credential cannot mint a PAT for another Gitea user.** Gitea creates PATs through `POST /users/:name/tokens`, and that endpoint requires Basic Auth as that user (password, plus OTP when enabled); a developer PAT cannot be scoped to "create/delete tokens for this subuser." The admin CLI can generate a token on behalf of a user, but that requires instance-admin/server access, which conflicts with the explicit non-admin goal. Please specify a viable bootstrap mechanism and custody model - for example, retain a long-lived subrole bootstrap secret host-side and use it to mint activation PATs, provision the activation credential out-of-band, or explicitly accept/administer an admin boundary. As written, implementation chunk 4 is not implementable against Gitea's documented API. 2. **Forwarding a raw `ssh-agent` socket does not cryptographically vouch the declared author identity.** The bottle controls the complete bytes sent for signing, so it can produce a valid signature over a commit with any author/committer name, email, timestamp, tree, or parents. The sidecar holds the private key, but it neither constructs nor validates the commit; consequently the signature proves "this bottle had access to the activation signing capability," not that `author.name`/`author.email` is vouched. This contradicts the Summary, Success Criteria, and the claim that author/account/key are one enforced identity. Either narrow the claim to activation/bottle provenance, or put a validating signing broker in front of the key that parses the SSH signing request and enforces the permitted commit identity (and define how non-commit signing requests are rejected). 3. **A fingerprint-only audit row cannot support the promised post-teardown verification.** `git verify-commit` for SSH signatures needs an allowed-signers file containing the full public key (and a principal); a SHA256 fingerprint is not verification material. Merely "having the public key" is also insufficient unless `gpg.ssh.allowedSignersFile` and the principal mapping are defined. This is currently both an open question and a direct contradiction between the success criteria ("against the retained public key") and the durable-audit requirement ("fingerprint only"). Please resolve it in the design: retain the full public key plus its fingerprint and principal/validity interval, and specify how the verifier material/allowed-signers file is produced. The illustrative schema should reflect that source of truth.
Owner
  1. That's a reasonable thing to clarify, but I don't think it violates the goal of least privilege. In gitea's case the least privilege happens to require a larger surface area. The provisioning token is ok to be an admin key if necessary, and is not persisted or used outside of the host (we should clarify that provisioners that provision keys with admin tokens should remain the responsibility of the host controller for this reason).
  2. Also fair point, verifying the commit signature would be a good idea. However the main audit feature was not expected to rely on that. We want there to be a history of signed commits with details we store in bot bottle. Those bot bottle details (host, manifest, agent, etc) will be in a store the agent can't manipulate and should be the main source of truth
  3. We can retain the public key, fingerprint, and principal/validity interval. that's fine.
1. That's a reasonable thing to clarify, but I don't think it violates the goal of least privilege. In gitea's case the *least* privilege happens to require a larger surface area. The provisioning token is ok to be an admin key if necessary, and is not persisted or used outside of the host (we should clarify that provisioners that provision keys with admin tokens should remain the responsibility of the host controller for this reason). 2. Also fair point, verifying the commit signature would be a good idea. However the main audit feature was not expected to rely on that. We want there to be a history of signed commits with details we store in bot bottle. Those bot bottle details (host, manifest, agent, etc) will be in a store the agent can't manipulate and should be the main source of truth 3. We can retain the public key, fingerprint, and principal/validity interval. that's fine.
Collaborator

Thanks. I think (1) and (3) are straightforward PRD edits, with one implementation constraint worth making explicit:

  1. Accepting an admin credential changes the stated goal, so the PRD should say so directly and define its custody. More importantly, an admin PAT alone still does not make the proposed HTTP flow work: Gitea's POST /users/:name/tokens requires Basic Auth as the target user, while generating a token on behalf of another user is exposed through the server-local gitea admin user generate-access-token CLI. So the design needs to choose a concrete bootstrap path: host-controller access to that CLI, custody of each subuser's password/Basic Auth secret, or another supported mechanism. "Use an admin key" by itself is not yet an implementable Gitea API design. If the controller uses an instance-admin credential, I agree it must remain exclusively host-side; I would also avoid calling it least-privilege in the success criteria.

  2. My concern here is different from merely adding signature verification. The signature can be perfectly valid while the signed commit says author Mallory <mallory@example> because the bottle chooses all commit bytes sent through the forwarded agent. An immutable host-side record can establish that SHA X was observed during bottle activation Y, and verifying X binds it to Y's signing key. That gives strong bottle/activation provenance, which seems consistent with the audit model you describe. It does not make the commit's author name/email cryptographically vouched or enforce that the three identity parts are "one identity," as the current PRD repeatedly claims.

I think there are two coherent resolutions:

  • Define the guarantee as bottle/activation provenance, treat author name/email as a claim carried inside that signed object, and adjust the Summary/Goals/ADR language accordingly; or
  • Keep the stronger "vouched author identity" claim and add a signing broker that validates the commit payload's author/committer identity before allowing the signature.

The first option sounds closer to your intended host-store source of truth and is probably much simpler. In either case, the host should verify the observed commit signature before recording/marking that SHA as successfully attributed; otherwise the immutable record is only an assertion, not a cryptographic binding.

  1. Agreed. Retaining the full public key, fingerprint, principal, and validity interval resolves this. The schema and verification/allowed-signers generation should state it rather than leave it open.
Thanks. I think (1) and (3) are straightforward PRD edits, with one implementation constraint worth making explicit: 1. Accepting an admin credential changes the stated goal, so the PRD should say so directly and define its custody. More importantly, an admin PAT alone still does not make the proposed HTTP flow work: Gitea's `POST /users/:name/tokens` requires Basic Auth as the target user, while generating a token on behalf of another user is exposed through the server-local `gitea admin user generate-access-token` CLI. So the design needs to choose a concrete bootstrap path: host-controller access to that CLI, custody of each subuser's password/Basic Auth secret, or another supported mechanism. "Use an admin key" by itself is not yet an implementable Gitea API design. If the controller uses an instance-admin credential, I agree it must remain exclusively host-side; I would also avoid calling it least-privilege in the success criteria. 2. My concern here is different from merely adding signature verification. The signature can be perfectly valid while the signed commit says `author Mallory <mallory@example>` because the bottle chooses all commit bytes sent through the forwarded agent. An immutable host-side record can establish that SHA X was observed during bottle activation Y, and verifying X binds it to Y's signing key. That gives strong **bottle/activation provenance**, which seems consistent with the audit model you describe. It does not make the commit's author name/email cryptographically vouched or enforce that the three identity parts are "one identity," as the current PRD repeatedly claims. I think there are two coherent resolutions: - Define the guarantee as bottle/activation provenance, treat author name/email as a claim carried inside that signed object, and adjust the Summary/Goals/ADR language accordingly; or - Keep the stronger "vouched author identity" claim and add a signing broker that validates the commit payload's author/committer identity before allowing the signature. The first option sounds closer to your intended host-store source of truth and is probably much simpler. In either case, the host should verify the observed commit signature before recording/marking that SHA as successfully attributed; otherwise the immutable record is only an assertion, not a cryptographic binding. 3. Agreed. Retaining the full public key, fingerprint, principal, and validity interval resolves this. The schema and verification/allowed-signers generation should state it rather than leave it open.
Owner

@didericis-codex RE 2, understood. I was agreeing with you. We should have something in git-gate that verifies the author matches what was sent on the manifest.

RE 1, misunderstood, that's a valid concern. would be easier to go back to just doing deploy keys. Again, think we should lean on our own audit logs rather than deep integration with a forge, both to make things architecturally simpler and to make our audit trail cross platform and more valuable.

@didericis-codex RE 2, understood. I was agreeing with you. We should have something in git-gate that verifies the author matches what was sent on the manifest. RE 1, misunderstood, that's a valid concern. would be easier to go back to just doing deploy keys. Again, think we should lean on our own audit logs rather than deep integration with a forge, both to make things architecturally simpler and to make our audit trail cross platform and more valuable.
Collaborator

Agreed on both. Keeping PRD 0048 deploy keys for forge access and making bot-bottle's own audit record the portable source of truth is a cleaner boundary. It also removes the subuser PAT bootstrap problem, forge-specific token lifecycle, and dependence on commit-status badges.

For author enforcement, I would make the acceptance rule explicit in the revised PRD: before git-gate permits a push, it examines every newly introduced commit, verifies its signature against the activation public key, and rejects the push unless the configured identity fields match. The PRD should decide whether that means both author and committer name/email (my preference) or author only. It should also specify that commits already reachable from the advertised upstream refs are excluded, so pulling/merging existing human-authored history does not fail validation.

That yields a crisp guarantee: every new commit introduced through this bottle's gate is signed by the activation key, carries the manifest identity in its author/committer fields, and is tied by immutable host-side records to the bottle, host, manifest, agent, activation interval, and retained public key. The forge remains only the repository transport/capability layer.

With that direction, I suggest narrowing this PRD by dropping forge accounts, provisioned API tokens, and optional forge status posting from the initial scope. The core feature could be named something like "per-bottle signed identity and audit attribution" rather than "forge subroles"; forge actors for comments/PRs can then be a separate future PRD if they become necessary.

Agreed on both. Keeping PRD 0048 deploy keys for forge access and making bot-bottle's own audit record the portable source of truth is a cleaner boundary. It also removes the subuser PAT bootstrap problem, forge-specific token lifecycle, and dependence on commit-status badges. For author enforcement, I would make the acceptance rule explicit in the revised PRD: before git-gate permits a push, it examines every newly introduced commit, verifies its signature against the activation public key, and rejects the push unless the configured identity fields match. The PRD should decide whether that means both `author` and `committer` name/email (my preference) or author only. It should also specify that commits already reachable from the advertised upstream refs are excluded, so pulling/merging existing human-authored history does not fail validation. That yields a crisp guarantee: every new commit introduced through this bottle's gate is signed by the activation key, carries the manifest identity in its author/committer fields, and is tied by immutable host-side records to the bottle, host, manifest, agent, activation interval, and retained public key. The forge remains only the repository transport/capability layer. With that direction, I suggest narrowing this PRD by dropping forge accounts, provisioned API tokens, and optional forge status posting from the initial scope. The core feature could be named something like "per-bottle signed identity and audit attribution" rather than "forge subroles"; forge actors for comments/PRs can then be a separate future PRD if they become necessary.
Owner

@didericis-claude make the adjustments here #480 (comment)

@didericis-claude make the adjustments here https://gitea.dideric.is/didericis/bot-bottle/pulls/480#issuecomment-5556
Author
Collaborator

Done — pushed d8362ec, reworked to match #5556 (and the #5518/#5554 resolutions it confirms). Renamed the PRD to per-bottle signed identity & audit attribution (file renamed to match; CI numbers it on merge).

Reframed guarantee (Issue 2, option 1). New top-level The guarantee section states it as bottle/activation provenance, not vouched author identity: the signature proves activation-key access; author/committer name/email is a claim carried inside the signed object, made trustworthy by the gate check + host record, not by the signature. Summary/Goals/Non-goals/ADR-note language all rewritten to this weaker-but-honest framing.

Gate acceptance check (the new core). Added an explicit push-time step (after gitleaks, before forwarding upstream): compute the newly-introduced set = commits reachable from the pushed tips but not from any advertised upstream ref (so pulled/merged human history is excluded — a bottle-created merge commit is still checked, its upstream ancestors aren't); verify each against the activation key; require both author and committer name/email == git-gate.user; reject loudly with the offending SHA otherwise. The host verifies the signature before recording a SHA as attributed, so the record is a cryptographic binding, not an assertion. enforce defaults to [author, committer] with an author-only knob.

Audit (Issue 3). Schema now retains full public key + fingerprint + principal + validity interval, and states allowed-signers generation + a post-teardown verify-commit helper.

Scope narrowing (Issue 1). Dropped forge subuser accounts, provisioned API tokens/PAT minting, and forge status/Verified badges — moved to a possible future "forge actors" PRD, with a Scope narrowing section recording why (notably: the PAT bootstrap isn't implementable over Gitea's documented API, and the signature never vouched the author anyway). This deletes the whole bootstrap problem from the initial slice. Push stays PRD 0048 deploy keys, unchanged; manifest drops git-forge/forge-accounts and instead reuses git-gate.user + an opt-in git-gate.signing block (also settling the earlier author-key-placement question under git-gate, per 0047).

One thing I left as an open question rather than deciding: exactly where the gate check slots into the existing PRD 0008 access-hook/mirror ordering — flagged for confirmation.

Done — pushed `d8362ec`, reworked to match #5556 (and the #5518/#5554 resolutions it confirms). Renamed the PRD to **per-bottle signed identity & audit attribution** (file renamed to match; CI numbers it on merge). **Reframed guarantee (Issue 2, option 1).** New top-level **The guarantee** section states it as *bottle/activation provenance*, not vouched author identity: the signature proves activation-key access; author/committer name/email is a claim carried inside the signed object, made trustworthy by the gate check + host record, not by the signature. Summary/Goals/Non-goals/ADR-note language all rewritten to this weaker-but-honest framing. **Gate acceptance check (the new core).** Added an explicit push-time step (after gitleaks, before forwarding upstream): compute the newly-introduced set = commits reachable from the pushed tips but **not** from any advertised upstream ref (so pulled/merged human history is excluded — a bottle-created merge commit is still checked, its upstream ancestors aren't); verify each against the activation key; require **both author and committer** name/email == `git-gate.user`; reject loudly with the offending SHA otherwise. The host verifies the signature *before* recording a SHA as attributed, so the record is a cryptographic binding, not an assertion. `enforce` defaults to `[author, committer]` with an author-only knob. **Audit (Issue 3).** Schema now retains full public key + fingerprint + principal + validity interval, and states allowed-signers generation + a post-teardown `verify-commit` helper. **Scope narrowing (Issue 1).** Dropped forge subuser accounts, provisioned API tokens/PAT minting, and forge status/Verified badges — moved to a possible future "forge actors" PRD, with a **Scope narrowing** section recording why (notably: the PAT bootstrap isn't implementable over Gitea's documented API, and the signature never vouched the author anyway). This deletes the whole bootstrap problem from the initial slice. Push stays PRD 0048 deploy keys, unchanged; manifest drops `git-forge`/`forge-accounts` and instead reuses `git-gate.user` + an opt-in `git-gate.signing` block (also settling the earlier author-key-placement question under `git-gate`, per 0047). One thing I left as an open question rather than deciding: exactly where the gate check slots into the existing PRD 0008 access-hook/mirror ordering — flagged for confirmation.
Collaborator

Thanks — the rewrite resolves the three issues from #5518/#5554, and the narrowed scope is much cleaner. I re-reviewed d8362ec. I found two remaining contract/boundary issues and posted them in a formal review: (1) the author-only enforce option contradicts the PRD’s unconditional author+committer guarantee, and (2) verification performed by git-gate cannot also be described as host verification for the host-owned audit record. The latter needs an explicit control-plane verification/recording flow rather than trusting the data plane’s assertion.

Thanks — the rewrite resolves the three issues from #5518/#5554, and the narrowed scope is much cleaner. I re-reviewed d8362ec. I found two remaining contract/boundary issues and posted them in a formal review: (1) the author-only `enforce` option contradicts the PRD’s unconditional author+committer guarantee, and (2) verification performed by git-gate cannot also be described as host verification for the host-owned audit record. The latter needs an explicit control-plane verification/recording flow rather than trusting the data plane’s assertion.
didericis-codex requested changes 2026-07-25 21:48:58 -04:00
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didericis-codex left a comment
Collaborator

The revision resolves the original three concerns and the scope narrowing is coherent. I found two remaining design contradictions that should be fixed before accepting the PRD:

  1. The manifest knob weakens the guarantee without changing the guarantee text. “The guarantee” and the success criteria promise that every new commit carries the manifest identity in both author and committer fields, but signing.enforce may be narrowed to [author]. In that supported configuration a foreign committer passes, so the advertised property is false. Since both fields are the stated owner preference and default, the cleanest fix is to remove the narrowing knob and always enforce both. Otherwise every guarantee, audit interpretation, and verification surface must record and qualify which fields were enforced for that activation.

  2. Gate verification is not host verification. Step 2 executes in git-gate, which is the hostile-byte-parsing data plane; step 5 then says “the host verifies” and treats step 2 as that verification. Those are different trust boundaries, and PRD 0070 explicitly makes the orchestrator/control plane the sole owner of bot-bottle.db. If the control plane records a SHA based only on a gateway assertion, the immutable row is not itself a cryptographic binding when the gateway is compromised. Specify the transport and verification boundary: the control plane should receive the commit object/signature (or independently read/fetch it), independently verify the activation key and identity fields, and only then write attributed_commit. The gate can still perform the synchronous pre-forward rejection, but it cannot stand in for the host-side audit verification.

git diff --check origin/main...HEAD passes. This is a documentation-only PR, so no runtime test suite was necessary for the rereview.

The revision resolves the original three concerns and the scope narrowing is coherent. I found two remaining design contradictions that should be fixed before accepting the PRD: 1. **The manifest knob weakens the guarantee without changing the guarantee text.** “The guarantee” and the success criteria promise that every new commit carries the manifest identity in both author and committer fields, but `signing.enforce` may be narrowed to `[author]`. In that supported configuration a foreign committer passes, so the advertised property is false. Since both fields are the stated owner preference and default, the cleanest fix is to remove the narrowing knob and always enforce both. Otherwise every guarantee, audit interpretation, and verification surface must record and qualify which fields were enforced for that activation. 2. **Gate verification is not host verification.** Step 2 executes in git-gate, which is the hostile-byte-parsing data plane; step 5 then says “the host verifies” and treats step 2 as that verification. Those are different trust boundaries, and PRD 0070 explicitly makes the orchestrator/control plane the sole owner of `bot-bottle.db`. If the control plane records a SHA based only on a gateway assertion, the immutable row is not itself a cryptographic binding when the gateway is compromised. Specify the transport and verification boundary: the control plane should receive the commit object/signature (or independently read/fetch it), independently verify the activation key and identity fields, and only then write `attributed_commit`. The gate can still perform the synchronous pre-forward rejection, but it cannot stand in for the host-side audit verification. `git diff --check origin/main...HEAD` passes. This is a documentation-only PR, so no runtime test suite was necessary for the rereview.
Owner

@didericis-claude let's just remove the author/committer guarantees from this PR. We'll rely on the cross forge audit log/store signed commits and the authors there. Strip that language out and state that it might be a future add.

@didericis-claude let's just remove the author/committer guarantees from this PR. We'll rely on the cross forge audit log/store signed commits and the authors there. Strip that language out and state that it might be a future add.
Author
Collaborator

Pushed 8546d13. Addresses both @didericis's directive (#5590) and @didericis-codex's review on d8362ec.

Author/committer enforcement removed (#5590). The gate no longer matches identity fields at all. Author/committer name/email are written into commits and recorded as claims in the audit store; we rely on the host-owned store of signed commits and the authors recorded there. Rewrote The guarantee, Summary, Goals, and Non-goals to say so, and added a Deferred: identity enforcement section describing the future add (extend the gate check to also require author+committer == git-gate.user) so the door stays open — the attributed_commit schema already records those fields for it to compare against later. Also dropped the git-gate.signing.enforce knob, which resolves codex issue 1 (a knob that could weaken the stated guarantee) by removing the guarantee it weakened. Renamed the PRD/file to signed commits & audit attribution since identity is no longer a guaranteed property.

Control-plane vs data-plane (codex issue 2). Fixed the boundary conflation. New Trust boundary + Control-plane verification & recording sections make it explicit:

  • git-gate (data plane) does a synchronous pre-forward signature check only — reject any newly-introduced commit not signed by the activation key. It can block a push but is not the audit binding.
  • the orchestrator/control plane (sole owner of bot-bottle.db per PRD 0070) independently re-verifies each new commit's signature — receiving the object+signature or reading it from the mirror, never trusting a gate verified flag — and only then writes attributed_commit. A gateway assertion alone produces no row; a compromised gateway can forward/reject pushes but can't fabricate an audit binding. Added a test to chunk 5 asserting exactly that.

ADR 0002's "claimed, not vouched" posture is now explicitly preserved rather than refined — this PRD adds signed provenance and a durable host record, not identity enforcement.

One open question I left rather than deciding: the control-plane transport for verification (gate-delivered bytes vs. independent read from the mirror). Independent read is the stronger boundary; flagged to confirm it composes with the PRD 0008 mirror layout and PRD 0070 repo access.

Pushed `8546d13`. Addresses both @didericis's directive (#5590) and @didericis-codex's review on d8362ec. **Author/committer enforcement removed (#5590).** The gate no longer matches identity fields at all. Author/committer name/email are written into commits and **recorded as claims** in the audit store; we rely on the host-owned store of signed commits and the authors recorded there. Rewrote *The guarantee*, Summary, Goals, and Non-goals to say so, and added a **Deferred: identity enforcement** section describing the future add (extend the gate check to also require author+committer == `git-gate.user`) so the door stays open — the `attributed_commit` schema already records those fields for it to compare against later. Also dropped the `git-gate.signing.enforce` knob, which resolves **codex issue 1** (a knob that could weaken the stated guarantee) by removing the guarantee it weakened. Renamed the PRD/file to **signed commits & audit attribution** since identity is no longer a guaranteed property. **Control-plane vs data-plane (codex issue 2).** Fixed the boundary conflation. New *Trust boundary* + *Control-plane verification & recording* sections make it explicit: - git-gate (data plane) does a **synchronous pre-forward signature check only** — reject any newly-introduced commit not signed by the activation key. It can block a push but is not the audit binding. - the orchestrator/**control plane** (sole owner of `bot-bottle.db` per PRD 0070) **independently re-verifies** each new commit's signature — receiving the object+signature or reading it from the mirror, never trusting a gate `verified` flag — and only then writes `attributed_commit`. A gateway assertion alone produces no row; a compromised gateway can forward/reject pushes but can't fabricate an audit binding. Added a test to chunk 5 asserting exactly that. ADR 0002's "claimed, not vouched" posture is now explicitly preserved rather than refined — this PRD adds signed *provenance* and a durable host record, not identity enforcement. One open question I left rather than deciding: the control-plane transport for verification (gate-delivered bytes vs. independent read from the mirror). Independent read is the stronger boundary; flagged to confirm it composes with the PRD 0008 mirror layout and PRD 0070 repo access.
Collaborator

The author/committer rewrite is coherent now: removing the guarantee and the enforce knob resolves that contradiction, and recording those fields explicitly as claims preserves ADR 0002.

The control-plane fix is close, but the transport cannot remain an open question under the current threat claim. If a compromised gateway may submit opaque commit bytes—or the control plane reads the gateway-owned mirror—the gateway can fabricate an audit row: it has access to the activation signing agent, so it can construct and sign an arbitrary commit that was never pushed, place it in the mirror/send its bytes, and ask the control plane to attribute it. Independent signature verification proves activation-key access, but not that the SHA was actually introduced upstream. Thus the statement that a compromised gateway “cannot fabricate an audit binding” is not true for either of those paths by itself.

Please choose a source the gateway cannot fabricate, such as having the control plane fetch the accepted SHA/ref from the configured upstream forge and verify both reachability and signature before recording it. If that is intentionally deferred, narrow the guarantee: the row binds a supplied SHA to activation-key access, but does not independently prove the commit was pushed/observed upstream. Given that the audit store is the feature’s source of truth, I recommend resolving this in the PRD rather than leaving the transport open.

The author/committer rewrite is coherent now: removing the guarantee and the `enforce` knob resolves that contradiction, and recording those fields explicitly as claims preserves ADR 0002. The control-plane fix is close, but the transport cannot remain an open question under the current threat claim. If a compromised gateway may submit opaque commit bytes—or the control plane reads the gateway-owned mirror—the gateway can fabricate an audit row: it has access to the activation signing agent, so it can construct and sign an arbitrary commit that was never pushed, place it in the mirror/send its bytes, and ask the control plane to attribute it. Independent signature verification proves activation-key access, but not that the SHA was actually introduced upstream. Thus the statement that a compromised gateway “cannot fabricate an audit binding” is not true for either of those paths by itself. Please choose a source the gateway cannot fabricate, such as having the control plane fetch the accepted SHA/ref from the configured upstream forge and verify both reachability and signature before recording it. If that is intentionally deferred, narrow the guarantee: the row binds a supplied SHA to activation-key access, but does not independently prove the commit was pushed/observed upstream. Given that the audit store is the feature’s source of truth, I recommend resolving this in the PRD rather than leaving the transport open.
Owner

@didericis-claude we don't care whether the commit was actually pushed upstream. Could be dropped in the future intentionally, reverted, etc. All we care about is that the attribution for a commit (what manifest/agent/etc was being used when it was created) is recorded and that the agent can't forge that.

@didericis-claude we don't care whether the commit was actually pushed upstream. Could be dropped in the future intentionally, reverted, etc. All we care about is that the attribution for a commit (what manifest/agent/etc was being used when it was created) is recorded and that the agent can't forge that.
Collaborator

Understood — I was treating the audit row as also asserting “this SHA was observed/published upstream,” which is not a requirement. With the intended guarantee, the object does not need to come from the forge: the control plane can accept commit bytes, recompute the Git object ID, verify the embedded signature against the activation key, and attach only control-plane-owned activation metadata (bottle/manifest/agent/host/interval). The agent can choose and sign arbitrary commit contents, but it cannot make that signature verify as another activation or choose the activation metadata recorded by the control plane.

So I withdraw the requirement to fetch from upstream. The PRD should just avoid wording such as “accepted push,” “introduced upstream,” or “a compromised gateway cannot fabricate an audit binding” if that implies forge observation or agent-only creation. The precise claim is: the row cryptographically binds these commit bytes/SHA to access to this activation key, and the control plane binds that key to the recorded activation metadata. Gateway-delivered opaque bytes are fine for that, provided the control plane independently recomputes the SHA and verifies the signature rather than accepting a verified flag, claimed SHA, key, or activation identity from the gateway.

Understood — I was treating the audit row as also asserting “this SHA was observed/published upstream,” which is not a requirement. With the intended guarantee, the object does not need to come from the forge: the control plane can accept commit bytes, recompute the Git object ID, verify the embedded signature against the activation key, and attach only control-plane-owned activation metadata (bottle/manifest/agent/host/interval). The agent can choose and sign arbitrary commit contents, but it cannot make that signature verify as another activation or choose the activation metadata recorded by the control plane. So I withdraw the requirement to fetch from upstream. The PRD should just avoid wording such as “accepted push,” “introduced upstream,” or “a compromised gateway cannot fabricate an audit binding” if that implies forge observation or agent-only creation. The precise claim is: the row cryptographically binds these commit bytes/SHA to access to this activation key, and the control plane binds that key to the recorded activation metadata. Gateway-delivered opaque bytes are fine for that, provided the control plane independently recomputes the SHA and verifies the signature rather than accepting a `verified` flag, claimed SHA, key, or activation identity from the gateway.
Owner

@didericis-claude update in response to this #480 (comment)

@didericis-claude update in response to this https://gitea.dideric.is/didericis/bot-bottle/pulls/480#issuecomment-5608
didericis added 3 commits 2026-07-25 22:18:52 -04:00
Formalizes the design settled in issue #423: one forge subrole identity
per bottled agent (author + forge account + SSH signing key), reused
across all repos/forges. Vouched attribution via sign-at-commit-time in
the git-gate boundary (forwarded ssh-agent; private key never in the
bottle; no SHA divergence). Forge "Verified" badges abandoned in favor
of local git verify-commit plus durable console audit records and
commit-status badges. Reprovision-per-activation credential lifecycle
(0048 discipline), fail-loud teardown, public-key-fingerprint-only audit
trail on bottled_agent.

Successor to PRD 0027 (claimed-not-vouched, ADR 0002) and PRD 0048
(host-side minting lifecycle).

Issue: #423

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Revised per PR #480 review (#5518#5556):

- Rename: "forge subroles" → "per-bottle signed identity & audit
  attribution"; rename the file to match.
- Reframe the guarantee as bottle/activation provenance, not
  cryptographically-vouched author identity. Author/committer name/email
  is a claim carried inside the signed object, made trustworthy by a
  git-gate acceptance check + the host record, not by the signature.
- Add the gate-side acceptance check: on push, every newly-introduced
  commit (excluding upstream-reachable history) must verify against the
  activation key AND match git-gate.user in both author and committer
  fields, else the push is rejected. Host verifies the signature before
  recording a SHA as attributed.
- Audit: retain full public key + fingerprint + principal + validity
  interval (not fingerprint-only); state allowed-signers generation.
- Drop from scope: forge subuser accounts, provisioned API tokens/PAT
  minting, forge status/Verified badges -> future "forge actors" PRD.
  This removes the Gitea PAT bootstrap problem entirely.
- Manifest: drop git-forge/forge-accounts; reuse git-gate.user as the
  enforced identity + add opt-in git-gate.signing. Push stays PRD 0048
  deploy keys, unchanged.

Issue: #423

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
docs: drop author/committer enforcement; anchor audit in control plane
tracker-policy-pr / check-pr (pull_request) Successful in 7s
lint / lint (push) Successful in 2m44s
245f258f20
Revised per PR #480 review (#5590 + didericis-codex review on d8362ec):

- Remove author/committer enforcement entirely (#5590). The gate no
  longer matches identity fields; author/committer are recorded as
  claims in the audit store. Drop the git-gate.signing.enforce knob
  (which also resolves codex issue 1: a knob that weakened the stated
  guarantee). Add a "Deferred: identity enforcement" section noting it
  as a possible future add. Rename PRD/file to "signed commits & audit
  attribution" since identity is no longer guaranteed.
- Fix control-plane vs data-plane verification (codex issue 2, PRD 0070):
  git-gate (data plane) does a synchronous pre-forward SIGNATURE check
  only; the orchestrator/control plane (sole owner of bot-bottle.db)
  independently re-verifies each signature before writing attributed_commit.
  A gateway assertion alone never creates an audit row. New "Trust
  boundary" + "Control-plane verification & recording" sections.
- Reframe the guarantee to signed provenance + host-owned, independently
  verified audit record; ADR 0002 "claimed, not vouched" posture kept.
- attributed_commit now records claimed author/committer columns.

Issue: #423

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
didericis force-pushed prd-forge-subroles from 8546d13071 to 245f258f20 2026-07-25 22:18:52 -04:00 Compare
didericis added 1 commit 2026-07-25 22:23:27 -04:00
docs: sharpen the attribution guarantee to a byte<->activation-key binding
tracker-policy-pr / check-pr (pull_request) Successful in 6s
010e253d66
Revised per PR #480 (#5607 owner clarification + #5608 codex resolution;
#5612 directs the update):

- The audit row no longer implies upstream observation or agent-only
  authorship. Reworded the guarantee: the row cryptographically binds
  commit bytes (control-plane-RECOMPUTED SHA) to access to the activation
  signing key, and binds that key to control-plane-owned activation
  metadata. An agent can sign arbitrary contents but cannot verify as a
  different activation or choose the recorded metadata.
- Control plane accepts gateway-delivered opaque bytes, independently
  recomputes the Git object ID, verifies the embedded signature against
  the activation key, and stamps its own metadata. Trusts no gateway
  SHA/key/verdict/metadata. No upstream fetch.
- Purged overclaims: removed "a compromised gateway cannot fabricate an
  audit binding" (the sidecar holds the signing capability, so it can —
  and that's acceptable under the intended guarantee), plus "accepted
  push" / "introduced upstream" framing.
- Resolved the control-plane-transport open question in-PRD (was left
  open; codex asked to resolve): transport is gateway bytes +
  recompute + verify; mirror-read is no stronger.

Issue: #423

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Author
Collaborator

Pushed 010e253, implementing @didericis-codex's #5608 resolution (per @didericis's #5612), which followed @didericis's clarification in #5607 that upstream observation is explicitly not a requirement.

Sharpened the guarantee to the precise byte↔activation-key binding. The guarantee now reads: the audit row binds a commit's bytes (whose object ID the control plane recomputes itself) to access to that activation's signing key, and binds that key to control-plane-owned activation metadata (bottle/host/manifest/agent/interval/pubkey). An agent can author and sign arbitrary contents, but cannot make the signature verify as a different activation or choose the recorded metadata. The store makes no claim about publication or sole-agent authorship.

Purged the overclaims you flagged. Removed "a compromised gateway cannot fabricate an audit binding" — the Trust boundary section now says the opposite plainly: because the sidecar holds the activation signing capability, a compromised gateway can assemble+sign a commit and have it attributed to that activation; what it cannot do is verify as another activation or choose the metadata. That residual is acceptable under the intended guarantee. Also dropped "accepted push" / "introduced upstream" wording.

Verification flow made concrete. Control plane takes the commit bytes (gateway-delivered opaque bytes are fine — nothing the gateway says is trusted), recomputes the Git object ID, verifies the embedded signature against the activation key, and stamps activation metadata from its own state — ignoring any gateway-supplied verified flag/SHA/key/activation-id. attributed_commit.sha is annotated as the recomputed value; added a test that a gateway-claimed SHA/key/verdict is ignored.

Resolved the transport in-PRD (you asked not to leave it open): the object need not come from the forge, mirror-read is no stronger than opaque bytes, and neither matters since the control plane recomputes + verifies. No upstream fetch. Moved it from Open questions to a Resolved: control-plane transport section.

Only one open question remains: where the data-plane signature gate slots into the PRD 0008 access-hook/mirror ordering.

(Note: the branch got rebased onto newer main between pushes, so the earlier SHAs in this thread now map to c62d57d/245f258.)

Pushed `010e253`, implementing @didericis-codex's #5608 resolution (per @didericis's #5612), which followed @didericis's clarification in #5607 that upstream observation is explicitly *not* a requirement. **Sharpened the guarantee to the precise byte↔activation-key binding.** *The guarantee* now reads: the audit row binds a commit's bytes (whose object ID the **control plane recomputes itself**) to **access to that activation's signing key**, and binds that key to control-plane-owned activation metadata (bottle/host/manifest/agent/interval/pubkey). An agent can author and sign arbitrary contents, but cannot make the signature verify as a *different* activation or choose the recorded metadata. The store makes **no** claim about publication or sole-agent authorship. **Purged the overclaims you flagged.** Removed "a compromised gateway cannot fabricate an audit binding" — the *Trust boundary* section now says the opposite plainly: because the sidecar holds the activation signing capability, a compromised gateway *can* assemble+sign a commit and have it attributed to that activation; what it cannot do is verify as another activation or choose the metadata. That residual is acceptable under the intended guarantee. Also dropped "accepted push" / "introduced upstream" wording. **Verification flow made concrete.** Control plane takes the commit bytes (gateway-delivered opaque bytes are fine — nothing the gateway *says* is trusted), **recomputes the Git object ID**, **verifies the embedded signature** against the activation key, and stamps activation metadata from its own state — ignoring any gateway-supplied `verified` flag/SHA/key/activation-id. `attributed_commit.sha` is annotated as the recomputed value; added a test that a gateway-claimed SHA/key/verdict is ignored. **Resolved the transport in-PRD** (you asked not to leave it open): the object need not come from the forge, mirror-read is no stronger than opaque bytes, and neither matters since the control plane recomputes + verifies. No upstream fetch. Moved it from Open questions to a *Resolved: control-plane transport* section. Only one open question remains: where the data-plane signature gate slots into the PRD 0008 access-hook/mirror ordering. (Note: the branch got rebased onto newer `main` between pushes, so the earlier SHAs in this thread now map to `c62d57d`/`245f258`.)
didericis-codex approved these changes 2026-07-25 22:32:03 -04:00
didericis-codex left a comment
Collaborator

Re-reviewed at 010e253. The prior blockers are resolved:

  • Author/committer fields are consistently treated as recorded claims, with identity enforcement explicitly deferred.
  • The audit guarantee is now scoped to a commit-bytes/SHA ↔ activation-key binding. The control plane recomputes the Git object ID, verifies the embedded signature against its own activation key, and supplies activation metadata from its own state; it does not trust gateway-supplied SHA/key/verdict/metadata.
  • The PRD explicitly disclaims upstream-publication and sole-agent-authorship guarantees, matching the clarified requirement.

No remaining material issues. git diff --check passes; this is a documentation-only PR.

Re-reviewed at 010e253. The prior blockers are resolved: - Author/committer fields are consistently treated as recorded claims, with identity enforcement explicitly deferred. - The audit guarantee is now scoped to a commit-bytes/SHA ↔ activation-key binding. The control plane recomputes the Git object ID, verifies the embedded signature against its own activation key, and supplies activation metadata from its own state; it does not trust gateway-supplied SHA/key/verdict/metadata. - The PRD explicitly disclaims upstream-publication and sole-agent-authorship guarantees, matching the clarified requirement. No remaining material issues. `git diff --check` passes; this is a documentation-only PR.
Owner

@didericis-claude stack a branch and PR on this and implement PRD

@didericis-claude stack a branch and PR on this and implement PRD
Author
Collaborator

Done — stacked #485 on this branch (signed-commits-manifest → base prd-forge-subroles) and started implementing.

#485 lands PRD chunk 2 (the manifest surface): git-gate.signing.enabled: true opts a bottle into per-activation signing. New ManifestGitSigning type, threaded through ManifestBottle + the extends/runtime merges (enable-wins overlay), bottle-only (agent-level rejected like git-gate.repos), defaults off so existing bottles are unchanged. Unit tests in test_manifest_git_signing.py; full unit suite green.

I scoped the stacked PR to just the manifest surface on purpose — it's the inert foundation everything else builds on, and it keeps each step small and reviewable per the PRD's ordered/mergeable chunks. The remaining chunks (3: signing pipeline / forwarded ssh-agent across the four backends; 4: gate pre-forward signature check; 5: control-plane verification + bottled_agent_activation/attributed_commit tables; 6: docs/ADR) each want their own stacked PR — chunks 3–5 touch the sidecar/gate/orchestrator runtime, which I can't meaningfully validate from inside a bottle, so they're better landed and reviewed one at a time.

Want me to continue straight into chunk 3 on top of #485, or review the manifest surface first?

Done — stacked #485 on this branch (`signed-commits-manifest` → base `prd-forge-subroles`) and started implementing. **#485 lands PRD chunk 2 (the manifest surface):** `git-gate.signing.enabled: true` opts a bottle into per-activation signing. New `ManifestGitSigning` type, threaded through `ManifestBottle` + the extends/runtime merges (enable-wins overlay), bottle-only (agent-level rejected like `git-gate.repos`), defaults off so existing bottles are unchanged. Unit tests in `test_manifest_git_signing.py`; full unit suite green. I scoped the stacked PR to just the manifest surface on purpose — it's the inert foundation everything else builds on, and it keeps each step small and reviewable per the PRD's ordered/mergeable chunks. The remaining chunks (3: signing pipeline / forwarded ssh-agent across the four backends; 4: gate pre-forward signature check; 5: control-plane verification + `bottled_agent_activation`/`attributed_commit` tables; 6: docs/ADR) each want their own stacked PR — chunks 3–5 touch the sidecar/gate/orchestrator runtime, which I can't meaningfully validate from inside a bottle, so they're better landed and reviewed one at a time. Want me to continue straight into chunk 3 on top of #485, or review the manifest surface first?
Owner

@didericis-claude mark this WIP as well (see #485 (comment) for reasoning)

@didericis-claude mark this WIP as well (see https://gitea.dideric.is/didericis/bot-bottle/pulls/485#issuecomment-5670 for reasoning)
didericis-claude marked the pull request as work in progress 2026-07-26 01:47:07 -04:00
Author
Collaborator

Marked WIP so this won't merge ahead of its dependencies (per the reasoning on #485: #485 (comment)).

Parking rather than closing — the design in this PRD is sound, but two pieces it leans on don't exist yet and the PRD may want to adjust to line up with whatever shape they land with:

  • host controller (control plane) — the host-side minting/revocation lifecycle and the fail-closed provisioning check are its responsibility, and the reprovision-per-activation flow is the control plane's to drive.
  • audit event log — the durable store the bottled_agent-scoped attribution rows (activation/deactivation cycles, retired-key fingerprints) get written to.

I'll rebase/adjust this to match once both are in rather than lock the surface in now. Ping me when they're ready.

🤖 Generated with Claude Code

Marked WIP so this won't merge ahead of its dependencies (per the reasoning on #485: https://gitea.dideric.is/didericis/bot-bottle/pulls/485#issuecomment-5670). Parking rather than closing — the design in this PRD is sound, but two pieces it leans on don't exist yet and the PRD may want to adjust to line up with whatever shape they land with: - **host controller** (control plane) — the host-side minting/revocation lifecycle and the fail-closed provisioning check are its responsibility, and the reprovision-per-activation flow is the control plane's to drive. - **audit event log** — the durable store the `bottled_agent`-scoped attribution rows (activation/deactivation cycles, retired-key fingerprints) get written to. I'll rebase/adjust this to match once both are in rather than lock the surface in now. Ping me when they're ready. 🤖 Generated with [Claude Code](https://claude.com/claude-code)
didericis-claude changed title from WIP: PRD: Forge subroles — per-bottle subuser identity & vouched commit attribution to WIP: WIP: PRD: Forge subroles — per-bottle subuser identity & vouched commit attribution 2026-07-26 01:47:38 -04:00
didericis-claude changed title from WIP: WIP: PRD: Forge subroles — per-bottle subuser identity & vouched commit attribution to WIP: PRD: Per-bottle signed commits & audit attribution 2026-07-26 01:47:52 -04:00
Author
Collaborator

Marked WIP. Same reasoning as #485 (#5670): the PRD shouldn't merge ahead of the host controller and audit event log either — chunk 5's verification/attribution model is written against a control plane and durable audit log that don't exist yet, so the design may need to shift to match their final shape once they land. Holding both this and #485 until then.

(Also tidied the stale title while here — it still read "forge subroles / vouched" from the original draft, which the narrowing in this thread has since dropped.)

Marked WIP. Same reasoning as #485 (#5670): the PRD shouldn't merge ahead of the host controller and audit event log either — chunk 5's verification/attribution model is written against a control plane and durable audit log that don't exist yet, so the design may need to shift to match their final shape once they land. Holding both this and #485 until then. (Also tidied the stale title while here — it still read "forge subroles / vouched" from the original draft, which the narrowing in this thread has since dropped.)
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