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hop: initial project state

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This commit is contained in:
Hop
2026-07-11 08:35:07 -07:00
parent ed2cba60db
commit a70773826f
14 changed files with 960 additions and 174 deletions
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internal/hop/db.go
+97 -24
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@@ -15,7 +15,7 @@ import (
_ "modernc.org/sqlite"
)
const schemaVersion = 1
const schemaVersion = 2
var (
ErrNotFound = errors.New("hop: not found")
@@ -137,20 +137,21 @@ type migration struct {
statements []string
}
var migrations = []migration{{
version: 1,
statements: []string{
`CREATE TABLE IF NOT EXISTS meta (
var migrations = []migration{
{
version: 1,
statements: []string{
`CREATE TABLE IF NOT EXISTS meta (
key TEXT PRIMARY KEY,
value TEXT NOT NULL
) STRICT`,
`CREATE TABLE IF NOT EXISTS tasks (
`CREATE TABLE IF NOT EXISTS tasks (
id TEXT PRIMARY KEY,
title TEXT NOT NULL,
status TEXT NOT NULL,
created_at TEXT NOT NULL
) STRICT`,
`CREATE TABLE IF NOT EXISTS states (
`CREATE TABLE IF NOT EXISTS states (
id TEXT PRIMARY KEY,
kind TEXT NOT NULL,
task_id TEXT REFERENCES tasks(id) ON DELETE SET NULL DEFERRABLE INITIALLY DEFERRED,
@@ -164,7 +165,7 @@ var migrations = []migration{{
digest TEXT NOT NULL,
created_at TEXT NOT NULL
) STRICT`,
`CREATE TABLE IF NOT EXISTS attempts (
`CREATE TABLE IF NOT EXISTS attempts (
id TEXT PRIMARY KEY,
task_id TEXT NOT NULL REFERENCES tasks(id) ON DELETE CASCADE DEFERRABLE INITIALLY DEFERRED,
agent TEXT NOT NULL,
@@ -174,7 +175,7 @@ var migrations = []migration{{
status TEXT NOT NULL,
created_at TEXT NOT NULL
) STRICT`,
`CREATE TABLE IF NOT EXISTS state_parents (
`CREATE TABLE IF NOT EXISTS state_parents (
state_id TEXT NOT NULL REFERENCES states(id) ON DELETE CASCADE,
parent_state_id TEXT NOT NULL REFERENCES states(id) ON DELETE RESTRICT,
role TEXT NOT NULL,
@@ -182,7 +183,7 @@ var migrations = []migration{{
PRIMARY KEY (state_id, parent_order),
UNIQUE (state_id, parent_state_id, role)
) STRICT`,
`CREATE TABLE IF NOT EXISTS checks (
`CREATE TABLE IF NOT EXISTS checks (
id TEXT PRIMARY KEY,
attempt_id TEXT NOT NULL REFERENCES attempts(id) ON DELETE CASCADE,
state_id TEXT REFERENCES states(id) ON DELETE SET NULL,
@@ -192,7 +193,7 @@ var migrations = []migration{{
output TEXT NOT NULL,
created_at TEXT NOT NULL
) STRICT`,
`CREATE TABLE IF NOT EXISTS events (
`CREATE TABLE IF NOT EXISTS events (
id TEXT PRIMARY KEY,
kind TEXT NOT NULL,
task_id TEXT REFERENCES tasks(id) ON DELETE SET NULL,
@@ -201,20 +202,35 @@ var migrations = []migration{{
payload_json TEXT NOT NULL,
created_at TEXT NOT NULL
) STRICT`,
`CREATE INDEX IF NOT EXISTS states_task_created_idx ON states(task_id, created_at, id)`,
`CREATE INDEX IF NOT EXISTS states_attempt_created_idx ON states(attempt_id, created_at, id)`,
`CREATE INDEX IF NOT EXISTS states_kind_created_idx ON states(kind, created_at, id)`,
`CREATE INDEX IF NOT EXISTS state_parents_parent_idx ON state_parents(parent_state_id, state_id)`,
`CREATE INDEX IF NOT EXISTS state_parents_role_idx ON state_parents(state_id, role, parent_order)`,
`CREATE INDEX IF NOT EXISTS attempts_task_created_idx ON attempts(task_id, created_at, id)`,
`CREATE INDEX IF NOT EXISTS attempts_status_created_idx ON attempts(status, created_at, id)`,
`CREATE INDEX IF NOT EXISTS checks_attempt_tree_idx ON checks(attempt_id, tree_hash, created_at, id)`,
`CREATE INDEX IF NOT EXISTS checks_tree_idx ON checks(tree_hash, created_at, id)`,
`CREATE INDEX IF NOT EXISTS events_created_idx ON events(created_at, id)`,
`CREATE INDEX IF NOT EXISTS events_task_idx ON events(task_id, created_at, id)`,
`CREATE INDEX IF NOT EXISTS events_attempt_idx ON events(attempt_id, created_at, id)`,
`CREATE INDEX IF NOT EXISTS states_task_created_idx ON states(task_id, created_at, id)`,
`CREATE INDEX IF NOT EXISTS states_attempt_created_idx ON states(attempt_id, created_at, id)`,
`CREATE INDEX IF NOT EXISTS states_kind_created_idx ON states(kind, created_at, id)`,
`CREATE INDEX IF NOT EXISTS state_parents_parent_idx ON state_parents(parent_state_id, state_id)`,
`CREATE INDEX IF NOT EXISTS state_parents_role_idx ON state_parents(state_id, role, parent_order)`,
`CREATE INDEX IF NOT EXISTS attempts_task_created_idx ON attempts(task_id, created_at, id)`,
`CREATE INDEX IF NOT EXISTS attempts_status_created_idx ON attempts(status, created_at, id)`,
`CREATE INDEX IF NOT EXISTS checks_attempt_tree_idx ON checks(attempt_id, tree_hash, created_at, id)`,
`CREATE INDEX IF NOT EXISTS checks_tree_idx ON checks(tree_hash, created_at, id)`,
`CREATE INDEX IF NOT EXISTS events_created_idx ON events(created_at, id)`,
`CREATE INDEX IF NOT EXISTS events_task_idx ON events(task_id, created_at, id)`,
`CREATE INDEX IF NOT EXISTS events_attempt_idx ON events(attempt_id, created_at, id)`,
},
},
}}
{
version: 2,
statements: []string{
`CREATE TABLE IF NOT EXISTS agent_sessions (
agent TEXT NOT NULL,
session_id TEXT NOT NULL,
head_state_id TEXT NOT NULL REFERENCES states(id) ON DELETE RESTRICT,
created_at TEXT NOT NULL,
updated_at TEXT NOT NULL,
PRIMARY KEY (agent, session_id)
) STRICT`,
`CREATE INDEX IF NOT EXISTS agent_sessions_head_idx ON agent_sessions(head_state_id)`,
},
},
}
func (s *Store) migrate(ctx context.Context) error {
var current int
@@ -337,6 +353,48 @@ func (s *Store) IsInitialized(ctx context.Context) (bool, error) {
return err == nil, err
}
// AgentSessionHead returns the latest prompt state associated with an agent
// session. Session heads let interactive agents turn follow-up messages into
// descendants without asking the human to carry Hop state IDs between turns.
func (s *Store) AgentSessionHead(ctx context.Context, agent, sessionID string) (string, bool, error) {
if strings.TrimSpace(agent) == "" || strings.TrimSpace(sessionID) == "" {
return "", false, errors.New("hop: agent and session ID are required")
}
var stateID string
err := s.db.QueryRowContext(ctx,
`SELECT head_state_id FROM agent_sessions WHERE agent = ? AND session_id = ?`,
agent, sessionID).Scan(&stateID)
if errors.Is(err, sql.ErrNoRows) {
return "", false, nil
}
if err != nil {
return "", false, fmt.Errorf("read agent session head: %w", err)
}
return stateID, true, nil
}
// SetAgentSessionHead records the prompt state that should parent the next
// message in an interactive agent session.
func (s *Store) SetAgentSessionHead(ctx context.Context, agent, sessionID, stateID string) error {
if strings.TrimSpace(agent) == "" || strings.TrimSpace(sessionID) == "" || strings.TrimSpace(stateID) == "" {
return errors.New("hop: agent, session ID, and state ID are required")
}
if redacted, findings := RedactPromptSecrets(agent + "\n" + sessionID); len(findings) > 0 || redacted != agent+"\n"+sessionID {
return errors.New("hop: refusing to persist a potential credential in agent session metadata")
}
now := formatTime(time.Now().UTC())
if _, err := s.db.ExecContext(ctx,
`INSERT INTO agent_sessions(agent, session_id, head_state_id, created_at, updated_at)
VALUES (?, ?, ?, ?, ?)
ON CONFLICT(agent, session_id) DO UPDATE SET
head_state_id = excluded.head_state_id,
updated_at = excluded.updated_at`,
agent, sessionID, stateID, now, now); err != nil {
return fmt.Errorf("record agent session head: %w", err)
}
return nil
}
// CreateTaskAttemptPrompt atomically creates all three records. The prompt is
// durable and the attempt head points to it before the transaction becomes
// visible, so an orchestrator may safely deliver the prompt after this returns.
@@ -360,6 +418,7 @@ func (s *Store) CreateTaskAttemptPrompt(
if task.Title == "" {
task.Title = prompt.Prompt
}
task.Title, _ = RedactPromptSecrets(task.Title)
if attempt.ID == "" {
attempt.ID = newID("at")
}
@@ -946,6 +1005,8 @@ func (s *Store) AddCheck(ctx context.Context, check Check) (Check, error) {
if check.CreatedAt.IsZero() {
check.CreatedAt = time.Now().UTC()
}
check.Command, _ = redactSecretStrings(check.Command)
check.Output, _ = RedactPromptSecrets(check.Output)
tx, err := s.db.BeginTx(ctx, nil)
if err != nil {
return Check{}, fmt.Errorf("begin check creation: %w", err)
@@ -1345,6 +1406,15 @@ func insertStateTx(ctx context.Context, tx *sql.Tx, state State, parents []Paren
if state.CreatedAt.IsZero() {
return errors.New("hop: state creation time is required")
}
for name, value := range map[string]string{
"prompt": state.Prompt,
"summary": state.Summary,
"agent": state.Agent,
} {
if redacted, findings := RedactPromptSecrets(value); len(findings) > 0 || redacted != value {
return fmt.Errorf("hop: refusing to persist an unredacted credential in state %s", name)
}
}
_, err := tx.ExecContext(ctx,
`INSERT INTO states(
id, kind, task_id, attempt_id, canonical_anchor_id, source_tree, git_commit,
@@ -1386,6 +1456,9 @@ func insertEventTx(ctx context.Context, tx *sql.Tx, event Event, payload any) er
return fmt.Errorf("encode event payload: %w", err)
}
}
if redacted, findings := RedactPromptSecrets(string(encoded)); len(findings) > 0 || redacted != string(encoded) {
return fmt.Errorf("hop: refusing to persist an unredacted credential in event %q", event.Kind)
}
_, err = tx.ExecContext(ctx,
`INSERT INTO events(id, kind, task_id, attempt_id, state_id, payload_json, created_at)
VALUES (?, ?, NULLIF(?, ''), NULLIF(?, ''), NULLIF(?, ''), ?, ?)`,