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# PRD: Mosaic Stack
- Status: approved, version 1.6. Jason approved draft 0.4 unchanged as
- Status: approved, version 1.8. Jason approved draft 0.4 unchanged as
1.0 on 2026-10-05 (lead decision 61). They approved version 1.1, the
Organization requirements, in decision 03130d08-ddce-480d-a601-e59f64744fc3
on 2026-10-14. They approved version 1.2, the chief of staff, the
@@ -15,7 +15,64 @@
confirmation of the text is the approval, so there is no in-Stack
prd.approve for it. Version 1.6 records Jason's ruling Q169 of
2026-10-16, on who removes and who configures the assistant. It is
never edited in place. Changes are a new version.
never edited in place. Changes are a new version. Version 1.7 routes the
chief of staff's hire and fire actions and the coder's push to its own
fork, and adds agent host access through the credential store, approved
by Jason in decision d52febb5 (prd.approve, yes). Version 1.8 records
Jason's ruling Q188 of 2026-10-20: trusted actions within role
guardrails by default, a manual mode for per-use raises, and grants the
chief of staff requests and the user approves. Jason approved it in T3,
relayed by Mos on 2026-10-21 (DECISIONS Q192), so there is no in-Stack
prd.approve for it.
- Version 1.8 source, Jason's approval in T3, relayed by Mos on 2026-10-21
(DECISIONS Q192): "PRD 1.8: I am preemptively approving it. Do not
surface in the Mosaic Stack board. Just proceed."
- Version 1.8 source, Jason's ruling Q188 (DECISIONS, 2026-10-20), his
answers to Q8 and Q10, in part. Q8: "I would rather grant the grant
right to an agent that runs with strict guardrails. That agent presents
the final authorization for the user. Upon approval, the grant is
created programmatically. I see this as: User configures their PATs, API
tokens, authorizations within the WebUI. The agent presents the request
for grant with X rights for another agent. The user reviews, then clicks
Approve/Deny. Click of Approve fires off protected mechanical methods to
handle the grants on Github, Gitea, .... services as needed. The tooling
would need to exist and must be guarded." And "Disallowing the agents to
create grants autonomously is a necessary evil for better security.
Requiring the user to manually perform the steps is a no-fly." Q10:
"Agents should have tools and command access based on roles. Those roles
dictate the allowed tools and commands. The use of a tool or command
should not be raised to the user unless the system is configured with a
manual mode that requires user interaction. By default I want to have
the agents capable of running commands and tools at will within their
sandbox/guardrails. This allows autonomous actions by agents within
their lanes. Perhaps a "Trusted actions within approved guardrails"
methodology." And "The main agent or chief of staff would be responsible
for surfacing the request to the user's inbox for approval. Not all
agents are capable or authorized to request directly. It must follow the
chain of command properly." He agreed with Mos's Q10 points 3 to 6:
protected stack code does every step on Approve, his tokens are entered
in the WebUI and agents never see them, a command on the approved list
runs without a click and any other is refused, and he, Mos or the tester
can revoke a grant at once.
- Version 1.8 source, Jason's ruling Q190 (DECISIONS, 2026-10-20), his
answer "Q12: O1": each agent seat gets its own account on his Gitea,
created through the Q188 approval path once the Gitea grants exist.
- Version 1.8 source, Jason's ruling Q191 (DECISIONS, through Mos in
mos-1149), that the assistant and the chief of staff are separate roles,
and only the chief raises a grant request: "Q13: that looks better".
- Version 1.7 source, TARGET.md line 66: "Chief of staff agent has
hire/fire authority for agents as needed; unless user forbids per
agent". And Jason through Mos (mos-1067), DECISIONS Q183, in part: "I
will still want to allow infra agent(s) on my .53 instance to access
other servers, etc. However, not all agents will need to have that
access. I envision a credential store within Mosaic Stack that works as
some sort of variable for the agent to call. The system will enforce
access to the credentials to keep the agents sandboxed with proper
security. I need to be able to trust my agents with assisting me. This
will require sudo access to several systems. If we can utilize the
credential store in Mosaic Stack and allow agents to perform their jobs
with NOPASSWD sudo on various machines, I am a happy man." DECISIONS
Q184, on whether that is in place by 10-27: "Q5: by 10.27"
- Version 1.6 source, Jason's ruling Q169 (DECISIONS, brain repo,
2026-10-16): "The only agent that should be able to remove the
assistant role is the chief of staff. The COS and the user should have
@@ -262,6 +319,39 @@ Added in version 1.2:
in its own words. It summarizes and doesn't relay their text. (Version
1.5.)
Added in version 1.7:
- **REQ-COS-3.** The chief of staff hires and fires role instances without
a decision each time. Hiring adds a role instance to the organization
file and lists it for launch. Firing ends the instance's runs and
removes it from the launch list. It stays in the organization file. Only
the user deletes an instance. These actions are `role.hire` and
`role.fire`. They leave the hard waits and route under this requirement,
within these bounds:
- The chief acts only in its own organization.
- The chief hires only role definitions that need no credentials, until
a later version adds credentialed roles.
- The chief hires only the role kinds its role file lists. Changing that
list is a reviewed commit.
- The chief hires only a role whose every action is on a fixed list of
plain work actions: sending messages, writing records, asking for
review, updating its assigned tasks, and the scope and working-push
actions of an assigned task. A role holding any other action, such as
launch, end, organization, naming, hire, review verdict or merge
authority, or any action added later, is never hired. So the chief
never hires a chief, never picks its own reviewers or merge gate, and
the author is never the reviewer. This holds whatever the role file's
list says. Adding to that list is a PRD change.
- The chief may set a hired instance's model and narrow its limits, and
nothing else about it.
- The user can forbid per agent. The user marks an instance so the chief
can't fire it, end its runs or change its model, and marks role kinds
the chief can't hire. Only the user changes these marks, through the
WebUI or the CLI.
- The kill switch stops every hire and fire while it is on.
- Every hire and fire is logged with the chief's instance, its run and
the reason.
### Variables
- **REQ-VAR-1.** Variables come in four layers: system, business, project
@@ -289,8 +379,111 @@ Added in version 1.2:
- in Vikunja, a `bot-<business>-<role>` user per role, plus one
read-only `bot-<business>-sync` that does all polling (lead
decisions 52 and 58).
Since version 1.8, a token or key for a grant is made by the grant code
on the user's Approve (REQ-GRANT-2), not by hand. Tokens that exist stay
as they are.
- **REQ-CRED-2.** A session that finds only founder credentials stops.
Added in version 1.7:
- **REQ-CRED-3.** An agent with a grant can run commands with sudo on
another host. The agent asks for the host credential by name. The stack
checks that a grant exists for that agent and that host before the
credential is used. The agent never sees the key or any other secret
value (REQ-CRED-1, REQ-VAR-2). An agent without a grant for that host is
refused. Not every agent gets a grant. Who grants a host credential, and
how, is set by the #424 design, which Jason approves.
Added in version 1.8 (Q188):
- **REQ-CRED-4.** An action a role definition lists within-role, and that
uses a grant, runs without a decision for each use only when all of
these hold:
- the definition declares the credential kind the action uses;
- a grant names that agent, and that host or service;
- for a command, the command matches the grant's allowlist. A grant
lists exact argv prefixes. A wildcard grant is refused;
- the agent's key or token for that grant is issued and not revoked.
A command off the allowlist is refused, and adding one takes a new grant
request (REQ-GRANT-1). An action whose definition doesn't list it
within-role still needs a decision for each use. Only a reviewed role
change adds an action to a definition. `host.sudo` routes under this
requirement.
- **REQ-GRANT-1.** No agent creates or writes a grant. A grant request
follows the chain of command, and only the chief of staff raises it to
the user's inbox. Any other role that needs a grant for itself or for an
agent it directs asks the chief of staff, through its chain: a worker
role through its PM, the PM and the CTO directly. The assistant passes
the user's own request to the chief of staff (REQ-ASSIST-1). The request
names the agent, the grant method and its target, the exact rights, and
a rotate-by or expiry date. The chief raises one only for an agent whose
reviewed role definition allows that kind of credential, and the broker
refuses any other. A grant can't name a wildcard, a shell or an empty
command. The request is a decision with the action `credential.mint`, so
it goes to the user as a hard wait (REQ-WAIT-1). A grant whose method
makes an account, such as a seat's own Gitea user (Q190), is the same
one decision: the method in the grant says it makes an account, the
request names the account, and the inbox shows the account name before
Approve. The user's one resolution covers the account and its
credential, so the hard-waits list doesn't change. An `account.create`
raise isn't a grant request and routes as version 1.7 has it. The broker
checks only that the chief of staff raised the request. The chain of
command before that is in the messaging lists and the role contracts,
not a broker check. The assistant and the chief of staff are separate
roles. No agent holds both, and the broker refuses a claim that would.
- **REQ-GRANT-2.** The user approves or denies each grant request in the
inbox. Approve is the only thing that creates a grant, and the code uses
a grant only when it has a matching Approve record. No agent creates a
grant. A grant written into the business file by hand makes nothing. Row
210's hand-written grants stay a test path until Vikunja #436a moves
`host.run` to grants made by Approve. On Approve, protected stack code
does every step, not an agent and not the user: it records the grant,
makes the key or token, installs it on the machine or creates it on the
service, and logs each step. On Deny nothing is made, and the denial is
logged. The grant methods are:
- machine key: a key for one agent on one enrolled host, with the
command allowlist of REQ-CRED-4. A host's identity comes from the host
side when the user approves its enrollment, never from a first
connection. A host user with sudo receives a grant only after the user
approved that user by name;
- Gitea: a token for one agent, and for an agent seat its own Gitea user
(Q190), with an expiry. The all scope and the admin scope are never
granted;
- GitHub: a grant for one agent.
The Gitea and GitHub rights units come in a later design that Jason
approves.
The approval binds the exact rights the user saw and the target or its
enrolled identity. A change to the agent, its definition, the target,
the target's identity or the rights after the raise voids it. An
approval is used once. A grant the code couldn't finish is undone at
once on the stack's side, so it is never used. What it left on the host
or service stays visible as pending until it is removed, as for a revoke
(REQ-GRANT-4). A new grant needs a new approval, never an automatic
retry. The grant code runs only on a request the user resolved. A
request resolved by an arbiter, the tester or any agent makes nothing. A
`credential.mint` decision raised before version 1.8, or without the
fields of REQ-GRANT-1, makes nothing when it is approved. Until the
Console knows the signed-in human (Vikunja #412), Approve is
`mosaic decide` in the CLI (REQ-DEC-3).
- **REQ-GRANT-3.** The user enters their own personal access tokens and
API tokens in the WebUI, or the CLI. Only the grant code reads them, to
make grants. No agent ever sees a token value or a key's private half.
Values appear in no event, log, message, prompt or agent file, and no
agent can read them back (REQ-VAR-2). Until the Console knows the
signed-in human, they are entered through the CLI.
- **REQ-GRANT-4.** A grant can be revoked at once by the user, by the
assistant for a grant in its own organization, or by the tester on a dev
instance (Q173). A revoke needs no decision and no new trust. It takes
effect at once on the stack's side, without waiting on the network, so
the next use is refused. Removing the key or token at the host or
service follows. Until that removal is done it stays visible as pending.
A revoke while the grant is being made stops it, and nothing it made
stays usable. Every revoke is logged with who made it.
### Decisions
- **REQ-DEC-1.** Every decision is a record in an append-only SQLite
@@ -338,6 +531,31 @@ Added in version 1.5 (Q167):
settled under one commit stays settled when a later commit lands, and
new raises cite the new commit.
### Trusted actions
Added in version 1.8 (Q188).
- **REQ-TRUST-1.** Agents act within their role guardrails without asking.
The default mode is "trusted actions within approved guardrails". An
action a role file grants within-role is done at will, inside the
agent's sandbox, its tool limit and its grants, and is logged. It raises
nothing to the user. An action the file doesn't grant within-role still
routes by REQ-DEC-2, and a hard wait still goes to the user
(REQ-WAIT-1). Only a reviewed role change adds an action to a role file,
and REQ-WAIT-2 still keeps every hard wait out of every role file.
- **REQ-TRUST-2.** The user can put chosen actions in manual mode. The
organization file holds the list of actions in manual mode, empty by
default. While an action is on the list, every use of it by any role
becomes a decision for that use, raised to the user, and the action
waits until the user resolves it. A decision denied, or not resolved,
refuses the action. Each decision is used once. For a command on another
host, the decision names the host, the command and its input. Actions
not on the list are unchanged. Only the user changes the list, through
the WebUI or the CLI. The chief of staff's organization writes
(REQ-ROLE-3) can't change it, and no agent can. Every change is logged
with who made it. A change applies to the next use, and a run already in
progress keeps no exemption.
### Hard waits
Added in version 1.5 (Q167).
@@ -371,6 +589,13 @@ Added in version 1.5 (Q167).
PRD version says it isn't. The reviewed commit that adds it names which
it is.
`role.hire` and `role.fire` were added as hard waits and route under
REQ-COS-3 since version 1.7. `git.push.remote` was added as a hard wait
and routes under REQ-LAND-2 since version 1.7.
`host.sudo` was added as a hard wait and routes under REQ-CRED-4 since
version 1.8.
### Messages
- **REQ-MSG-1.** Messages are addressed to a role. They are append-only
@@ -470,6 +695,37 @@ Added in version 1.5 (Q167, Mos's reading Q4).
decision; the check ships with whichever of rows 137 and 139 lands
second.
Added in version 1.7:
- **REQ-LAND-2.** A coder pushes its own work to its own fork. The action
is `git.push.remote`.
- What it pushes: one commit, by its oid, never a ref name. That commit
is the latest work commit the bus recorded for the coder's task, and
the coder made that push. A decision that authorizes a push names that
commit, and it doesn't authorize any other.
- Where it lands: only the branch
`refs/heads/<its Gitea user>/<branch>`. The host builds that name, the
agent never does. A push never forces.
- Which remote: the agent's own fork of the project's upstream. The
business file names the upstream, and the host never contacts it. For
each push the host builds the fork's address over https from the
upstream's host, port and repository name and the agent's own Gitea
user. The history check, the push and the credential match all use
that address. So the agent's own user owns the receiving repository on
every push, and the agent never names it.
- The host refuses an upstream on a host or port other than the agent's
Gitea, and an upstream the agent's own user owns. It refuses a fork
that is missing, empty or doesn't share the project's history. Gitea's
push-to-create stays off, so a push never creates a repository.
- Who may: the action routes under REQ-DEC-2 and is granted within-role
to the coder role only. No other role file grants it.
- Before version 1.7 the action was a hard wait under REQ-WAIT-3, so
each push needed a decision the human resolved, and that decision
named the commit.
Every push is logged with the remote, the ref, the commit and, when one
was given, the decision.
### Interface
- **REQ-CLI-1.** `mosaic` is the front door. From it Jason can:
@@ -925,6 +1181,13 @@ only hard waits in his inbox.
file only picks among modules already in the tree. The reviewed commit
that adds a module is the only check on what it does, which is why
modules from outside the repository wait for Jason (REQ-PLUG-1).
- Trusted mode lets an agent run its allowed commands at will. On another
host, an allowed command that writes a file as root or starts a shell
can plant a key, and the seat sandbox doesn't confine the network, so
root can outlive the grant and a revoke. The allowlist narrows this. A
seat sandbox with its own network namespace closes it. Until then the
host's own audit log is the check after the fact (row 210 design section
6).
## Milestones
+1 -1
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@@ -45,7 +45,7 @@ test('requirements returns the committed list to a holding role session, and no
const pm = agent('pm');
const list = call(b, pm, 'requirements');
assert.deepEqual(list, loadRequirements());
assert.equal(list.requirements.length, 58);
assert.equal(list.requirements.length, 68);
assert.deepEqual(call(b, agent('coder'), 'requirements'), list);
assert.throws(() => call(b, human, 'requirements'), /agent-required/);
assert.throws(() => call(b, reader, 'requirements'), /read-only/);
+11 -1
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@@ -1,6 +1,6 @@
{
"prd": "docs/prd/mosaic-stack.md",
"version": "1.6",
"version": "1.8",
"requirements": [
{ "id": "REQ-ROLE-1", "title": "Each role is a reviewed roles/<name>.json: contract, authority map, credentials" },
{ "id": "REQ-ROLE-2", "title": "One holder per role instance, one per thread for the assistant; the chief of staff may end a run, others need a decision" },
@@ -13,16 +13,25 @@
{ "id": "REQ-ASSIST-1", "title": "The assistant is the user's main agent and passes organization work to the chief of staff" },
{ "id": "REQ-ASSIST-2", "title": "The broker limits the assistant to the user and the chief of staff in both directions; refusals logged" },
{ "id": "REQ-ASSIST-3", "title": "The assistant tells the user what other roles sent it in its own words and does not relay their text" },
{ "id": "REQ-COS-3", "title": "The chief of staff hires and fires role instances without a decision, within fixed bounds; the user forbids per agent" },
{ "id": "REQ-VAR-1", "title": "Variables in four layers, declared in code; limits intersect; unknown keys refused" },
{ "id": "REQ-VAR-2", "title": "One system config, never auto-written; secrets only as references the broker reads" },
{ "id": "REQ-CRED-1", "title": "Each role instance has its own Gitea and Vikunja token, held by the broker" },
{ "id": "REQ-CRED-2", "title": "A session that finds only founder credentials stops" },
{ "id": "REQ-CRED-3", "title": "An agent with a grant runs sudo commands on another host through the credential store and never sees the secret" },
{ "id": "REQ-CRED-4", "title": "A within-role grant action needs no decision only if kind declared, grant, live key or token, any command allowlisted" },
{ "id": "REQ-GRANT-1", "title": "No agent creates a grant; only the chief of staff raises a grant request, as a credential.mint hard wait" },
{ "id": "REQ-GRANT-2", "title": "Only the user's Approve creates a grant; protected stack code does every step, bound to the exact rights" },
{ "id": "REQ-GRANT-3", "title": "The user enters their own tokens in the WebUI or the CLI; only the grant code reads them and no agent sees a value" },
{ "id": "REQ-GRANT-4", "title": "The user, the assistant in its organization or the tester on a dev instance revokes a grant at once" },
{ "id": "REQ-DEC-1", "title": "Every decision is an append-only record: raiser, class, options, resolver, times" },
{ "id": "REQ-DEC-2", "title": "Decisions route by class: logged, to the domain arbiter, or to the human" },
{ "id": "REQ-DEC-3", "title": "Authorized-human resolutions come only from a mosaic CLI session outside any agent run" },
{ "id": "REQ-DEC-4", "title": "A blocking gated decision reaches an authorized human at once; the rest go in a daily digest" },
{ "id": "REQ-DEC-5", "title": "An approval outlives its run, binds to the decision, instance and thread, and is consumed once" },
{ "id": "REQ-DEC-6", "title": "A spec commit never reopens a settled decision" },
{ "id": "REQ-TRUST-1", "title": "Agents act within their role guardrails without asking; a within-role action is done at will and logged" },
{ "id": "REQ-TRUST-2", "title": "The user puts chosen actions in manual mode, so each use becomes a decision the user resolves" },
{ "id": "REQ-WAIT-1", "title": "Hard waits always go to the human: spend, delete, irreversible, exposure, accounts, external messages, protected push" },
{ "id": "REQ-WAIT-2", "title": "No role file grants a hard wait; changing the list or granting a listed action is itself a hard wait" },
{ "id": "REQ-WAIT-3", "title": "An action added to the vocabulary is a hard wait until a PRD version says it is not" },
@@ -37,6 +46,7 @@
{ "id": "REQ-PROJ-3", "title": "The Console edits the spec and docs Markdown as source with a preview; a stale save is refused" },
{ "id": "REQ-PROJ-4", "title": "Each human spec commit saved in the Console sends one notice to the PM and the CTO for review" },
{ "id": "REQ-LAND-1", "title": "A resolved merge decision lands into the working repository main through the host, only for a granted role" },
{ "id": "REQ-LAND-2", "title": "A coder pushes one recorded work commit by oid to its own fork, on a host-built branch, never forced" },
{ "id": "REQ-CLI-1", "title": "mosaic is the front door: talk to the assistant in a thread, the inbox, tasks, agents and trails" },
{ "id": "REQ-CLI-2", "title": "The assistant session mosaic talks to is launched and owned by the stack, not T3" },
{ "id": "REQ-WEB-1", "title": "The WebUI shows the CLI's data, a chat area of projects and threads, and Settings for agent limits" },
+3 -3
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@@ -18,10 +18,10 @@ test("the list holds the PRD's requirement ids, in its order, at its version", (
const ids = [...prd.matchAll(/^- \*\*(REQ-[A-Z]+-[0-9]+)\.\*\*/gm)].map((m) => m[1]);
// Any other mention of a bold id would be a bullet this pattern missed.
assert.equal(ids.length, [...prd.matchAll(/\*\*REQ-/g)].length);
assert.equal(ids.length, 58);
assert.equal(ids.length, 68);
assert.deepEqual(list.requirements.map((r) => r.id), ids);
assert.match(prd, new RegExp(`^- Status: approved, version ${list.version.replace('.', '\\.')}\\.`, 'm'));
assert.deepEqual([list.prd, list.version], ['docs/prd/mosaic-stack.md', '1.6']);
assert.deepEqual([list.prd, list.version], ['docs/prd/mosaic-stack.md', '1.8']);
});
test('the committed list loads frozen', () => {
@@ -74,7 +74,7 @@ test('the schema refuses any other shape', () => {
const twice = raw();
twice.requirements.push(structuredClone(twice.requirements[0]));
writeFileSync(join(dir, 'twice.json'), JSON.stringify(twice));
assert.throws(() => loadRequirements(join(dir, 'twice.json')), listError('requirements[58].id: REQ-ROLE-1 twice'));
assert.throws(() => loadRequirements(join(dir, 'twice.json')), listError('requirements[68].id: REQ-ROLE-1 twice'));
} finally {
rmSync(dir, { recursive: true, force: true });
}