Put Piggy on Prime Agent, and let it write to the book

Piggy was a hand-rolled OpenAI tool loop. It is now a Prime Agent session —
Prime Intellect's own harness, embedded as a Node library — answering from
PIG's tools and, for the first time, able to put information into the CRM
rather than only read it out.

The harness is a coding agent, so the first job was taking the coding agent
away from it. `noTools: 'all'` plus an explicit allowlist leaves the model
with PIG's ten `pig_*` tools and no bash, no filesystem, no IPython. That
holds under attack: a hostile extension, a skill and a settings file planted
in the agent's own directory, then `setActiveToolsByName` called with every
built-in, still leaves ten tools, all ours. Both lines are load-bearing —
`noTools` alone registers nothing, and the allowlist is what admits our own.

Writing is gated rather than assumed. A change is proposed, not made: the
tool returns a description, the transcript renders a diff card, and nothing
reaches the database until someone presses Apply. Contracts, commitments,
allocations and compliance always stop for a human whatever the mode. Every
write runs through `executeMutation` as the calling user, so their
capabilities and the audit trail apply exactly as they would to a human's.

Four things about the SDK are wrong in its own documentation and cost a
debugging cycle each: models.json does not resolve an env var name for
`apiKey`, it sends the literal string; there is no built-in prime-inference
provider in 0.84.1; a ResourceLoader you pass in is never reloaded for you;
and the stock system prompt is a coding-assistant prompt that must be
replaced — but replacing it also silently removes the tool list, because the
harness only renders that section when it owns the prompt. AGENTS.md records
all four.

The expensive one was thinking level. The harness defaults to `medium`, and
nemotron spent an entire 4,096-token budget reasoning and returned an empty
answer. `low` was worse; `off` omits the parameter so the endpoint's default
wins. An explicit `reasoning_effort: none` via `thinkingLevelMap` took a turn
from 6,195 output tokens to 149.

And a turn is now bounded. The harness loop is `while (true)` with no
iteration cap; a runaway on a frontier model would have eaten the credit it
is supposed to report on. Ceilings on model calls and tokens, enforced both
through the harness hook and independently from the event stream, plus a
per-user daily spend limit — and the ledger now records spend on turns that
fail, which it previously discarded.

Signing in lands on /piggy, which is a workspace: conversations down one
side, the agent in the middle, what it did and what it cost beside it.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>

packages/db/migrations/0014_piggy_conversations.sql

@@ -0,0 +1,68 @@
+-- Generated by drizzle-kit, then trimmed. Three statements it emitted are not
+-- here, and deleting them is the point rather than an oversight.
+--
+-- 0005, 0012 and 0013 were hand-written and left no snapshot, so drizzle
+-- diffed against 0011 and re-proposed their work: `ALTER TYPE pig_team_role
+-- ADD VALUE 'viewer'` (0012, and without the IF NOT EXISTS that made that one
+-- safe) and a drop-and-add of the learn_resources provider CHECK (0013). On
+-- any database those migrations have already touched, the first fails outright
+-- and the second is a needless drop of a live constraint. The 0014 snapshot
+-- beside this file is kept in full, because it describes the schema as it
+-- actually is — which is what re-synchronises the snapshot chain with the
+-- hand-written migrations for whoever generates 0015.
+--
+-- Everything below is additive: two new tables and one new nullable column.
+-- Nothing here reads or rewrites an existing row, so it cannot fail on data.
+CREATE TABLE "piggy_conversations" (
+	"id" uuid PRIMARY KEY DEFAULT gen_random_uuid() NOT NULL,
+	"user_id" uuid NOT NULL,
+	"title" text NOT NULL,
+	"model" text,
+	"mode" text,
+	"read_capability" text DEFAULT 'book:read' NOT NULL,
+	"context" jsonb,
+	"last_message_at" timestamp with time zone DEFAULT now() NOT NULL,
+	"created_at" timestamp with time zone DEFAULT now() NOT NULL,
+	"updated_at" timestamp with time zone DEFAULT now() NOT NULL,
+	CONSTRAINT "piggy_conversations_mode_check" CHECK ("piggy_conversations"."mode" IS NULL OR "piggy_conversations"."mode" IN ('read_only', 'confirm', 'auto')),
+	CONSTRAINT "piggy_conversations_read_capability_check" CHECK ("piggy_conversations"."read_capability" IN ('book:read', 'economics:read', 'team:read')),
+	CONSTRAINT "piggy_conversations_title_check" CHECK (length("piggy_conversations"."title") > 0)
+);
+--> statement-breakpoint
+CREATE TABLE "piggy_messages" (
+	"id" uuid PRIMARY KEY DEFAULT gen_random_uuid() NOT NULL,
+	"conversation_id" uuid NOT NULL,
+	"seq" integer NOT NULL,
+	"role" text NOT NULL,
+	"content" text DEFAULT '' NOT NULL,
+	"reasoning" text,
+	"model" text,
+	"mode" text,
+	"input_tokens" integer,
+	"output_tokens" integer,
+	"cost_micro_cents" integer,
+	"finish_reason" text,
+	"tool_call_id" text,
+	"tool_name" text,
+	"tool_arguments" jsonb,
+	"tool_result" jsonb,
+	"tool_ok" boolean,
+	"approval_id" text,
+	"approval_change" jsonb,
+	"approval_decision" text,
+	"approval_decided_at" timestamp with time zone,
+	"error" text,
+	"created_at" timestamp with time zone DEFAULT now() NOT NULL,
+	CONSTRAINT "piggy_messages_role_check" CHECK ("piggy_messages"."role" IN ('user', 'assistant', 'tool')),
+	CONSTRAINT "piggy_messages_mode_check" CHECK ("piggy_messages"."mode" IS NULL OR "piggy_messages"."mode" IN ('read_only', 'confirm', 'auto')),
+	CONSTRAINT "piggy_messages_approval_decision_check" CHECK ("piggy_messages"."approval_decision" IS NULL OR "piggy_messages"."approval_decision" IN ('apply', 'reject')),
+	CONSTRAINT "piggy_messages_seq_check" CHECK ("piggy_messages"."seq" >= 0)
+);
+--> statement-breakpoint
+ALTER TABLE "agent_runs" ADD COLUMN "piggy_conversation_id" uuid;--> statement-breakpoint
+ALTER TABLE "piggy_conversations" ADD CONSTRAINT "piggy_conversations_user_id_users_id_fk" FOREIGN KEY ("user_id") REFERENCES "public"."users"("id") ON DELETE cascade ON UPDATE no action;--> statement-breakpoint
+ALTER TABLE "piggy_messages" ADD CONSTRAINT "piggy_messages_conversation_id_piggy_conversations_id_fk" FOREIGN KEY ("conversation_id") REFERENCES "public"."piggy_conversations"("id") ON DELETE cascade ON UPDATE no action;--> statement-breakpoint
+ALTER TABLE "agent_runs" ADD CONSTRAINT "agent_runs_piggy_conversation_id_piggy_conversations_id_fk" FOREIGN KEY ("piggy_conversation_id") REFERENCES "public"."piggy_conversations"("id") ON DELETE set null ON UPDATE no action;--> statement-breakpoint
+CREATE INDEX "piggy_conversations_user_recent_idx" ON "piggy_conversations" USING btree ("user_id","last_message_at" DESC NULLS LAST);--> statement-breakpoint
+CREATE UNIQUE INDEX "piggy_messages_conversation_seq_key" ON "piggy_messages" USING btree ("conversation_id","seq");--> statement-breakpoint
+CREATE INDEX "agent_runs_piggy_conversation_idx" ON "agent_runs" USING btree ("piggy_conversation_id");