Add session-bound personal profile editing

CHANGELOG.md

@@ -2,6 +2,22 @@
 
 # Changelog
 
+## v0.1.0-preview.26 — 2026-09-05
+
+- Add optional self-profile readers and revision-checked username/display-name
+  writes. Recheck the active session, account and expected revision atomically
+  with a secret-free audit; preserve immutable user identity and ownership.
+- Username edits revoke other sessions but preserve the acting session. A
+  password-confirmed write can require the exact verified credential hash,
+  rejecting a concurrent password reset. Applications own reauthentication,
+  operation-bound passkey approval, CSRF/origin checks and rate/concurrency limits.
+- Add explicit SQLite schema 11 for monotonic profile revisions. Existing rows
+  begin at revision 1; startup with migrations disabled rejects older schemas.
+  Do not run older writers against schema 11 as a database rollback strategy.
+- Email changes are deliberately absent; pending-address verification and mail
+  delivery are separate work. Test invalid/restricted sessions, collisions,
+  concurrent/stale edits, audit rollback, restart and schema-10 migration.
+
 ## v0.1.0-preview.25 — 2026-09-05
 
 - Add optional, credential-free user and organization directory readers for

README.md

@@ -17,7 +17,7 @@ router, handlers, HTML, authorization decisions, cache behavior, and
 deployment. Adopt one boundary at a time; Go compiles and links only the
 packages you import.
 
-> **Public preview:** `v0.1.0-preview.25`. APIs may change before a stable
+> **Public preview:** `v0.1.0-preview.26`. APIs may change before a stable
 > release. Linux is the maintained release platform.
 
 ## Why Web Foundations?
@@ -57,14 +57,14 @@ owns—and, just as importantly, what remains application policy.
 Pin the preview in an application module:
 
 ```bash
-go get gamertan.com/web@v0.1.0-preview.25
+go get gamertan.com/web@v0.1.0-preview.26
 go mod verify
 ```
 
 An application may name the first package it intends to adopt:
 
 ```bash
-go get gamertan.com/web/requestmeta@v0.1.0-preview.25
+go get gamertan.com/web/requestmeta@v0.1.0-preview.26
 ```
 
 The version belongs to the `gamertan.com/web` module. See the

auth/profile.go

@@ -0,0 +1,75 @@
+// SPDX-License-Identifier: MPL-2.0
+
+package auth
+
+import (
+	"context"
+	"errors"
+	"strings"
+	"time"
+	"unicode"
+	"unicode/utf8"
+)
+
+var (
+	ErrProfileInput        = errors.New("auth: invalid profile change")
+	ErrProfileAccess       = errors.New("auth: profile session is unavailable")
+	ErrProfileConflict     = errors.New("auth: profile changed; reload before editing")
+	ErrUsernameUnavailable = errors.New("auth: username is unavailable")
+)
+
+// OwnProfile contains mutable identity, not credentials or organization roles.
+// Revision is independent of timestamps and increases for every profile edit.
+type OwnProfile struct {
+	UserID, Username, Email, DisplayName string
+	Revision                             int64
+}
+
+// ProfileEdit is a trusted repository command, not an HTTP input model. The
+// application must authenticate the session, validate CSRF/origin and rate-limit
+// mutations. Username edits additionally require recent reauthentication (and
+// any account-specific MFA). For password reauthentication, supply the verified
+// hash so a concurrent password reset invalidates the write. After verified
+// passkey approval, leave it empty. Do not log or serialize this command.
+type ProfileEdit struct {
+	UserID               string
+	SessionDigest        [32]byte
+	ExpectedRevision     int64
+	Field, Value         string
+	ExpectedPasswordHash string
+}
+
+// NormalizeProfileValue validates only supported fields. Email is deliberately
+// absent: verified mailbox changes need a separate pending/confirmation flow.
+func NormalizeProfileValue(field, value string) (string, error) {
+	value = strings.TrimSpace(value)
+	switch field {
+	case "username":
+		if !identifierPattern.MatchString(value) {
+			return "", ErrProfileInput
+		}
+	case "display_name":
+		if value == "" || len(value) > 128 || !utf8.ValidString(value) {
+			return "", ErrProfileInput
+		}
+		for _, r := range value {
+			if unicode.IsControl(r) {
+				return "", ErrProfileInput
+			}
+		}
+	default:
+		return "", ErrProfileInput
+	}
+	return value, nil
+}
+
+// OwnProfileRepository is optional; no change to the authentication Repository
+// interface is required. It derives access from the current session, never from
+// a site-wide administrator flag. Implementations atomically recheck identity,
+// session and revision, mutate one field, and append the audit. Username edits
+// revoke other sessions but preserve the acting session. They never reassign
+// stable IDs, memberships, passkeys, billing identities or historical records.
+type OwnProfileRepository interface {
+	OwnProfile(context.Context, [32]byte, time.Time) (OwnProfile, error)
+	UpdateOwnProfile(context.Context, ProfileEdit, AuditEvent) (OwnProfile, error)
+}

auth/profile_test.go

@@ -0,0 +1,43 @@
+// SPDX-License-Identifier: MPL-2.0
+
+package auth
+
+import "testing"
+
+func TestNormalizeProfileValue(t *testing.T) {
+	for _, value := range []struct{ field, value, want string }{
+		{"username", "  Reader.One ", "Reader.One"}, {"display_name", " Émilie ★ ", "Émilie ★"},
+	} {
+		got, err := NormalizeProfileValue(value.field, value.value)
+		if err != nil || got != value.want {
+			t.Fatalf("normalization: %q %v", got, err)
+		}
+	}
+	for _, value := range []struct{ field, value string }{
+		{"email", "new@example.test"}, {"role", "owner"}, {"username", "a"}, {"username", "foo@bar"},
+		{"display_name", ""}, {"display_name", "hello\x00world"}, {"display_name", "hello\nworld"}, {"display_name", string([]byte{0xff})},
+	} {
+		if _, err := NormalizeProfileValue(value.field, value.value); err == nil {
+			t.Fatalf("invalid field accepted: %s", value.field)
+		}
+	}
+}
+
+func FuzzProfileValue(f *testing.F) {
+	f.Add("username", "reader.one")
+	f.Add("display_name", "Émilie")
+	f.Add("email", "a@example.test")
+	f.Fuzz(func(t *testing.T, field, value string) {
+		normal, err := NormalizeProfileValue(field, value)
+		if err != nil {
+			return
+		}
+		if len(normal) == 0 || len(normal) > 128 {
+			t.Fatal("unbounded value")
+		}
+		again, err := NormalizeProfileValue(field, normal)
+		if err != nil || again != normal {
+			t.Fatal("unstable normalization")
+		}
+	})
+}

authsqlite/profile.go

@@ -0,0 +1,101 @@
+// SPDX-License-Identifier: MPL-2.0
+
+package authsqlite
+
+import (
+	"context"
+	"database/sql"
+	"errors"
+	"math"
+	"time"
+
+	"gamertan.com/web/auth"
+	"modernc.org/sqlite"
+)
+
+var _ auth.OwnProfileRepository = (*Store)(nil)
+
+const ownProfileQuery = `SELECT u.id,u.username,u.email,u.display_name,u.profile_revision
+	FROM gwf_users u JOIN gwf_auth_sessions s ON s.user_id=u.id
+	WHERE s.token_hash=? AND s.expires_at>? AND u.status='active'
+	AND u.registration_pending=0 AND u.password_change_required=0`
+
+func scanOwnProfile(row interface{ Scan(...any) error }) (auth.OwnProfile, error) {
+	var profile auth.OwnProfile
+	err := row.Scan(&profile.UserID, &profile.Username, &profile.Email, &profile.DisplayName, &profile.Revision)
+	if errors.Is(err, sql.ErrNoRows) {
+		return auth.OwnProfile{}, auth.ErrProfileAccess
+	}
+	return profile, err
+}
+
+func (store *Store) OwnProfile(ctx context.Context, session [32]byte, now time.Time) (auth.OwnProfile, error) {
+	if zeroDigest(session) || now.IsZero() {
+		return auth.OwnProfile{}, auth.ErrProfileAccess
+	}
+	return scanOwnProfile(store.db.QueryRowContext(ctx, ownProfileQuery, session[:], now.Unix()))
+}
+
+func (store *Store) UpdateOwnProfile(ctx context.Context, change auth.ProfileEdit, audit auth.AuditEvent) (auth.OwnProfile, error) {
+	value, err := auth.NormalizeProfileValue(change.Field, change.Value)
+	if err != nil || !opaqueID(change.UserID) || zeroDigest(change.SessionDigest) || change.ExpectedRevision < 1 || change.ExpectedRevision == math.MaxInt64 ||
+		!validAuditEvent(audit) || audit.ActorUserID != change.UserID || audit.ResourceType != "user" || audit.ResourceID != change.UserID || audit.Action != "auth.profile."+change.Field ||
+		change.ExpectedPasswordHash != "" && (change.Field != "username" || len(change.ExpectedPasswordHash) > 1024) {
+		return auth.OwnProfile{}, auth.ErrProfileInput
+	}
+	tx, err := store.db.BeginTx(ctx, nil)
+	if err != nil {
+		return auth.OwnProfile{}, err
+	}
+	defer tx.Rollback()
+	// This first statement takes the writer lock and tests the real current
+	// session/account/revision together. No read-before-write lock upgrade race.
+	set := `display_name=?`
+	args := []any{value}
+	if change.Field == "username" {
+		set = `username=?,username_normalized=?`
+		args = append(args, normalize(value))
+	}
+	args = append(args, audit.CreatedAt.Unix(), change.UserID, change.ExpectedRevision, change.SessionDigest[:], audit.CreatedAt.Unix(), change.ExpectedPasswordHash, change.ExpectedPasswordHash)
+	result, err := tx.ExecContext(ctx, `UPDATE gwf_users SET `+set+`,profile_revision=profile_revision+1,updated_at=MAX(updated_at,?)
+		WHERE id=? AND profile_revision=? AND status='active' AND registration_pending=0 AND password_change_required=0
+		AND EXISTS (SELECT 1 FROM gwf_auth_sessions WHERE user_id=gwf_users.id AND token_hash=? AND expires_at>?)
+		AND (?='' OR EXISTS (SELECT 1 FROM gwf_password_credentials WHERE user_id=gwf_users.id AND password_hash=?))`, args...)
+	if err != nil {
+		var constraint *sqlite.Error
+		if errors.As(err, &constraint) && constraint.Code() == 2067 {
+			return auth.OwnProfile{}, auth.ErrUsernameUnavailable
+		}
+		return auth.OwnProfile{}, err
+	}
+	changed, err := result.RowsAffected()
+	if err != nil {
+		return auth.OwnProfile{}, err
+	}
+	if changed != 1 {
+		profile, err := scanOwnProfile(tx.QueryRowContext(ctx, ownProfileQuery, change.SessionDigest[:], audit.CreatedAt.Unix()))
+		if err != nil {
+			return auth.OwnProfile{}, err
+		}
+		if profile.UserID != change.UserID {
+			return auth.OwnProfile{}, auth.ErrProfileAccess
+		}
+		return auth.OwnProfile{}, auth.ErrProfileConflict
+	}
+	if change.Field == "username" {
+		if _, err = tx.ExecContext(ctx, `DELETE FROM gwf_auth_sessions WHERE user_id=? AND token_hash<>?`, change.UserID, change.SessionDigest[:]); err != nil {
+			return auth.OwnProfile{}, err
+		}
+	}
+	if err = appendAudit(ctx, tx, audit); err != nil {
+		return auth.OwnProfile{}, err
+	}
+	profile, err := scanOwnProfile(tx.QueryRowContext(ctx, ownProfileQuery, change.SessionDigest[:], audit.CreatedAt.Unix()))
+	if err != nil {
+		return auth.OwnProfile{}, err
+	}
+	if err = tx.Commit(); err != nil {
+		return auth.OwnProfile{}, err
+	}
+	return profile, nil
+}

authsqlite/profile_test.go

@@ -0,0 +1,212 @@
+// SPDX-License-Identifier: MPL-2.0
+
+package authsqlite
+
+import (
+	"crypto/sha256"
+	"errors"
+	"path/filepath"
+	"sync"
+	"testing"
+	"time"
+
+	"gamertan.com/web/auth"
+)
+
+type profileFixture struct {
+	store          *Store
+	path           string
+	now            time.Time
+	user           auth.User
+	session, other auth.Session
+}
+
+func newProfileFixture(t *testing.T) profileFixture {
+	t.Helper()
+	path := filepath.Join(t.TempDir(), "identity.sqlite")
+	store, err := Open(path)
+	if err != nil {
+		t.Fatal(err)
+	}
+	t.Cleanup(func() { store.Close() })
+	now := time.Now().UTC().Truncate(time.Second)
+	user := auth.User{ID: "profile-user", Username: "profile.reader", Email: "profile@example.test", DisplayName: "Profile Reader", Status: "active", CreatedAt: now, UpdatedAt: now}
+	if err = store.CreateUser(t.Context(), user, "fixture-hash"); err != nil {
+		t.Fatal(err)
+	}
+	session := auth.Session{UserID: user.ID, Digest: sha256.Sum256([]byte("acting-session")), CreatedAt: now, LastSeenAt: now, ExpiresAt: now.Add(time.Hour)}
+	other := session
+	other.Digest = sha256.Sum256([]byte("other-session"))
+	for _, s := range []auth.Session{session, other} {
+		if err = store.CreateSession(t.Context(), s); err != nil {
+			t.Fatal(err)
+		}
+	}
+	return profileFixture{store, path, now, user, session, other}
+}
+
+func (f profileFixture) change(field, value string, revision int64) (auth.ProfileEdit, auth.AuditEvent) {
+	return auth.ProfileEdit{UserID: f.user.ID, SessionDigest: f.session.Digest, ExpectedRevision: revision, Field: field, Value: value},
+		auth.AuditEvent{ID: "profile-audit-" + field, ActorUserID: f.user.ID, Action: "auth.profile." + field, ResourceType: "user", ResourceID: f.user.ID, Summary: "Own profile field changed", CreatedAt: f.now}
+}
+
+func TestOwnProfileStableIdentityAndSessionPolicy(t *testing.T) {
+	f := newProfileFixture(t)
+	initial, err := f.store.OwnProfile(t.Context(), f.session.Digest, f.now)
+	if err != nil || initial.Revision != 1 {
+		t.Fatalf("initial revision: %d %v", initial.Revision, err)
+	}
+	change, audit := f.change("display_name", "  Émilie ★  ", 1)
+	updated, err := f.store.UpdateOwnProfile(t.Context(), change, audit)
+	if err != nil || updated.DisplayName != "Émilie ★" || updated.Revision != 2 || updated.UserID != initial.UserID || updated.Username != initial.Username || updated.Email != initial.Email {
+		t.Fatalf("display update: %+v %v", updated, err)
+	}
+	if _, err = f.store.OwnProfile(t.Context(), f.other.Digest, f.now); err != nil {
+		t.Fatal("display edit revoked session", err)
+	}
+	if _, err = f.store.UpdateOwnProfile(t.Context(), change, audit); !errors.Is(err, auth.ErrProfileConflict) {
+		t.Fatalf("stale: %v", err)
+	}
+	change, audit = f.change("username", "new.reader", 2)
+	change.ExpectedPasswordHash = "fixture-hash"
+	updated, err = f.store.UpdateOwnProfile(t.Context(), change, audit)
+	if err != nil || updated.Username != "new.reader" || updated.Revision != 3 || updated.UserID != initial.UserID || updated.Email != initial.Email {
+		t.Fatalf("username update: %+v %v", updated, err)
+	}
+	if _, err = f.store.OwnProfile(t.Context(), f.other.Digest, f.now); !errors.Is(err, auth.ErrProfileAccess) {
+		t.Fatalf("other session survived: %v", err)
+	}
+	user, hash, err := f.store.CredentialByIdentifier(t.Context(), "NEW.READER")
+	if err != nil || user.ID != initial.UserID || hash != "fixture-hash" {
+		t.Fatal("credential identity changed", err)
+	}
+	var count int
+	if err = f.store.db.QueryRow(`SELECT count(*) FROM gwf_audit_events WHERE actor_user_id=? AND resource_id=?`, f.user.ID, f.user.ID).Scan(&count); err != nil || count != 2 {
+		t.Fatalf("audits: %d %v", count, err)
+	}
+	reopened, err := OpenWithOptions(f.path, OpenOptions{Migrate: false})
+	if err != nil {
+		t.Fatal(err)
+	}
+	defer reopened.Close()
+	if recovered, err := reopened.OwnProfile(t.Context(), f.session.Digest, f.now); err != nil || recovered != updated {
+		t.Fatalf("restart: %+v %v", recovered, err)
+	}
+}
+
+func TestOwnProfileAuthorizationAndRollback(t *testing.T) {
+	for _, test := range []struct{ name, sql string }{
+		{"revoked-session", `DELETE FROM gwf_auth_sessions`},
+		{"expired-session", `UPDATE gwf_auth_sessions SET expires_at=1`},
+		{"suspended", `UPDATE gwf_users SET status='suspended'`},
+		{"disabled", `UPDATE gwf_users SET status='disabled'`},
+		{"registration-pending", `UPDATE gwf_users SET registration_pending=1`},
+		{"password-change", `UPDATE gwf_users SET password_change_required=1`},
+	} {
+		t.Run(test.name, func(t *testing.T) {
+			f := newProfileFixture(t)
+			if _, err := f.store.db.Exec(test.sql); err != nil {
+				t.Fatal(err)
+			}
+			change, audit := f.change("display_name", "not allowed", 1)
+			if _, err := f.store.UpdateOwnProfile(t.Context(), change, audit); !errors.Is(err, auth.ErrProfileAccess) {
+				t.Fatalf("access: %v", err)
+			}
+		})
+	}
+	f := newProfileFixture(t)
+	change, audit := f.change("username", "new.reader", 1)
+	change.UserID = "another-user"
+	audit.ActorUserID = change.UserID
+	audit.ResourceID = change.UserID
+	if _, err := f.store.UpdateOwnProfile(t.Context(), change, audit); !errors.Is(err, auth.ErrProfileAccess) {
+		t.Fatalf("foreign user: %v", err)
+	}
+	change, audit = f.change("username", "new.reader", 1)
+	change.ExpectedPasswordHash = "old-verified-hash"
+	if _, err := f.store.UpdateOwnProfile(t.Context(), change, audit); !errors.Is(err, auth.ErrProfileConflict) {
+		t.Fatalf("changed password: %v", err)
+	}
+	change.ExpectedPasswordHash = "fixture-hash"
+	if err := f.store.AppendAudit(t.Context(), audit); err != nil {
+		t.Fatal(err)
+	}
+	if _, err := f.store.UpdateOwnProfile(t.Context(), change, audit); err == nil {
+		t.Fatal("duplicate audit accepted")
+	}
+	if profile, err := f.store.OwnProfile(t.Context(), f.session.Digest, f.now); err != nil || profile.Revision != 1 || profile.Username != f.user.Username {
+		t.Fatalf("rollback: %+v %v", profile, err)
+	}
+	if _, err := f.store.OwnProfile(t.Context(), f.other.Digest, f.now); err != nil {
+		t.Fatal("audit failure revoked session", err)
+	}
+}
+
+func TestOwnProfileUniquenessConcurrencyAndMigration(t *testing.T) {
+	f := newProfileFixture(t)
+	otherUser := f.user
+	otherUser.ID = "another-user"
+	otherUser.Username = "another.reader"
+	otherUser.Email = "another@example.test"
+	if err := f.store.CreateUser(t.Context(), otherUser, "fixture-hash"); err != nil {
+		t.Fatal(err)
+	}
+	change, audit := f.change("username", "ANOTHER.READER", 1)
+	if _, err := f.store.UpdateOwnProfile(t.Context(), change, audit); !errors.Is(err, auth.ErrUsernameUnavailable) {
+		t.Fatalf("unique name: %v", err)
+	}
+	second, err := OpenWithOptions(f.path, OpenOptions{Migrate: false})
+	if err != nil {
+		t.Fatal(err)
+	}
+	defer second.Close()
+	var wg sync.WaitGroup
+	results := make(chan error, 2)
+	for _, store := range []*Store{f.store, second} {
+		wg.Add(1)
+		go func(store *Store) {
+			defer wg.Done()
+			change, audit := f.change("display_name", "New Name", 1)
+			_, err := store.UpdateOwnProfile(t.Context(), change, audit)
+			results <- err
+		}(store)
+	}
+	wg.Wait()
+	close(results)
+	success, conflict := 0, 0
+	for err := range results {
+		if err == nil {
+			success++
+		} else if errors.Is(err, auth.ErrProfileConflict) {
+			conflict++
+		} else {
+			t.Fatal(err)
+		}
+	}
+	if success != 1 || conflict != 1 {
+		t.Fatalf("concurrent writes: %d successes, %d conflicts", success, conflict)
+	}
+	// Recreate the actual previous schema without rewriting its identity rows.
+	if _, err = f.store.db.Exec(`ALTER TABLE gwf_users DROP COLUMN profile_revision`); err != nil {
+		t.Fatal(err)
+	}
+	if _, err = f.store.db.Exec(`DELETE FROM gamertan_web_migrations WHERE version=11`); err != nil {
+		t.Fatal(err)
+	}
+	if version, err := f.store.CurrentSchema(t.Context()); err != nil || version != 10 {
+		t.Fatalf("prior schema: %d %v", version, err)
+	}
+	if err = f.store.RequireCurrentSchema(t.Context()); err == nil {
+		t.Fatal("startup accepted old schema")
+	}
+	if err = f.store.Migrate(t.Context()); err != nil {
+		t.Fatal(err)
+	}
+	profile, err := f.store.OwnProfile(t.Context(), f.session.Digest, f.now)
+	if err != nil || profile.UserID != f.user.ID || profile.Email != f.user.Email || profile.DisplayName != "New Name" || profile.Revision != 1 {
+		t.Fatalf("migration: %+v %v", profile, err)
+	}
+	if err = f.store.Migrate(t.Context()); err != nil {
+		t.Fatal("idempotent migration", err)
+	}
+}

authsqlite/role_sets_test.go

@@ -351,7 +351,8 @@ func TestRoleInvitationMigrationPreservesLegacyAndRequiresExplicitMigration(t *t
 	// Reconstruct the previous invitation schema in this disposable database.
 	if _, err = f.store.db.Exec(`ALTER TABLE gwf_organization_invitations DROP COLUMN direct_roles_json;
 		ALTER TABLE gwf_organization_invitations DROP COLUMN required_owner_role;
-		DELETE FROM gamertan_web_migrations WHERE version=10`); err != nil {
+		ALTER TABLE gwf_users DROP COLUMN profile_revision;
+		DELETE FROM gamertan_web_migrations WHERE version>=10`); err != nil {
 		t.Fatal(err)
 	}
 	if err = f.store.RequireCurrentSchema(t.Context()); err == nil {

authsqlite/store.go

@@ -77,7 +77,7 @@ func OpenWithOptions(path string, options OpenOptions) (*Store, error) {
 	return store, nil
 }
 
-const SchemaVersion = 10
+const SchemaVersion = 11
 
 func (store *Store) CurrentSchema(ctx context.Context) (int, error) {
 	var exists int
@@ -179,6 +179,7 @@ func (store *Store) Migrate(ctx context.Context) error {
 		table, column, definition string
 	}{
 		{"gwf_users", "registration_pending", `INTEGER NOT NULL DEFAULT 0 CHECK(registration_pending IN (0,1))`},
+		{"gwf_users", "profile_revision", `INTEGER NOT NULL DEFAULT 1 CHECK(profile_revision > 0)`},
 		{"gwf_organizations", "status", `TEXT NOT NULL DEFAULT 'active' CHECK(status IN ('active','archived'))`},
 		{"gwf_organizations", "revision", `INTEGER NOT NULL DEFAULT 1 CHECK(revision > 0)`},
 		{"gwf_organizations", "updated_at", `INTEGER NOT NULL DEFAULT 0`},
@@ -244,6 +245,9 @@ func (store *Store) Migrate(ctx context.Context) error {
 	if _, err = tx.ExecContext(ctx, `INSERT OR IGNORE INTO gamertan_web_migrations(version,applied_at) VALUES(10,?)`, time.Now().UTC().Unix()); err != nil {
 		return err
 	}
+	if _, err = tx.ExecContext(ctx, `INSERT OR IGNORE INTO gamertan_web_migrations(version,applied_at) VALUES(11,?)`, time.Now().UTC().Unix()); err != nil {
+		return err
+	}
 	return tx.Commit()
 }
 

docs/ADOPTION.md

@@ -21,3 +21,26 @@ template. Its private evidence, persistent bans, account data, route policy,
 operator exclusions, synchronization, and publishing workflow remain
 application-owned. Useful pressure from that migration may improve a general
 interface, but it may not smuggle EQL-specific policy into this module.
+
+## Optional personal-profile editing
+
+`auth.OwnProfileRepository` supports a narrow self-service boundary independently
+of instance-directory authorization. Load the profile using the current session
+digest; derive the target from that result. Normalize one username or display
+name using `auth.NormalizeProfileValue`. Never decode an HTTP body directly into
+`auth.ProfileEdit`, which carries trusted identity and credential-check state.
+
+Require CSRF/origin validation for browser writes and rate-limit credential work.
+For username changes, verify the current password (supply its hash as
+`ExpectedPasswordHash`) or consume an exact operation-bound passkey approval;
+enforce any additional authentication policy your application requires. Include
+the session, user, value and expected profile revision in the passkey binding.
+The SQLite transaction rechecks session/account/revision and any verified hash,
+updates one field, revokes other sessions for username edits, and appends audit.
+Do not log the command or include secret material in its audit.
+
+Schema 11 adds `profile_revision` without changing stable identity keys. Run an
+explicit migration before starting an adopter with automatic migration disabled.
+Keep the pre-migration backup; adjacent older binaries are not approved writers
+for the migrated schema. Email-change enrollment/confirmation is not implemented
+by this interface and must not be simulated with an unverified direct update.

docs/DOGFOOD.md

@@ -8,6 +8,18 @@ application concern belongs in the shared module.
 
 ## Gamertan accounts and commerce
 
+- Personal identity editing is not instance administration. `OwnProfileRepository`
+  derives self-access from the active session; `ProfileEdit` is a trusted internal
+  command, never a browser request model. SQLite schema 11 adds a monotonic
+  revision because timestamps alone cannot distinguish two edits in one second.
+  Session/account/revision checks, mutation and audit share one write transaction.
+  Username edits invalidate other sessions without changing immutable IDs,
+  memberships, credentials, orders or provider billing identities. A password
+  proof binds the verified hash into that transaction; passkey proofs must bind
+  the exact user/session/field/value/revision before calling it. The application
+  chooses account-specific reauthentication and owns its credential-work limits.
+  Email requires a separate verified change protocol, not another accepted field.
+
 - Instance operators need all-user/all-organization directories, not a staff
   roster or implicit membership in every business. Optional bounded readers now
   expose identity/profile records without credentials, independent of membership.
@@ -47,8 +59,8 @@ application concern belongs in the shared module.
   policy; there is no new database schema or commerce dependency in Foundations.
 
 - The account email remains required and unique. Gamertan uses normalized
-  email as the canonical login identifier and keeps username as a stable public
-  identity. Until a mail package exists, the application must not describe an
+  email as the canonical login identifier; the immutable user ID, not the editable
+  username, owns account relationships. Until a mail package exists, it must not describe an
   address as verified merely because it was entered during registration.
 - Password authentication is sufficient for an ordinary customer base
   session. Privileged application actions use an exact operation binding with

docs/GETTING_STARTED.md

@@ -26,7 +26,7 @@ The packages are ordinary Go imports. Pin the current preview and verify its
 module checksum:
 
 ```bash
-go get gamertan.com/web/requestmeta@v0.1.0-preview.25
+go get gamertan.com/web/requestmeta@v0.1.0-preview.26
 go mod verify
 ```
 

scripts/public-snapshot.allow

@@ -30,6 +30,8 @@ analytics/geo.go
 auth/auth.go
 auth/context.go
 auth/directory.go
+auth/profile.go
+auth/profile_test.go
 auth/password.go
 auth/password_test.go
 authrecovery/recovery.go
@@ -44,6 +46,8 @@ authsqlite/store.go
 authsqlite/store_test.go
 authsqlite/directory.go
 authsqlite/directory_test.go
+authsqlite/profile.go
+authsqlite/profile_test.go
 authsqlite/account.go
 authsqlite/account_test.go
 authsqlite/access.go