diff --git a/frontend/src/lib/components/ScriptBuilder.svelte b/frontend/src/lib/components/ScriptBuilder.svelte
index 5080a05736..5842f4be1e 100644
--- a/frontend/src/lib/components/ScriptBuilder.svelte
+++ b/frontend/src/lib/components/ScriptBuilder.svelte
@@ -345,6 +345,12 @@
 	let pathError = $state('')
 	let loadingSave = $state(false)
 
+	console.log('[draft-sync] ScriptBuilder script-tag: enter', {
+		userDraftPath,
+		initialPath,
+		contentLen: script.content?.length ?? 0,
+		isEmpty: script.content == ''
+	})
 	if (script.content == '') {
 		// Suspend autosave around the bootstrap mutations — seeding the
 		// editor with the template's `initialCode` is a programmatic
@@ -355,7 +361,7 @@
 		// new drafts). Resumed in the async `.finally` so language
 		// switches AFTER bootstrap (which also call `initContent`) sync
 		// normally.
-		console.log('Suspending autosave for script bootstrap', userDraftPath)
+		console.log('[draft-sync] ScriptBuilder: bootstrap branch START', userDraftPath)
 		UserDraft.stopSync('script', userDraftPath)
 		if (template === 'wac_python') {
 			script.modules = {
@@ -372,9 +378,13 @@
 				}
 			}
 		}
+		console.log('[draft-sync] ScriptBuilder: calling initContent', userDraftPath)
 		initContent(script.language, script.kind, template).finally(() => {
+			console.log('[draft-sync] ScriptBuilder: initContent finally → restartSync', userDraftPath)
 			UserDraft.restartSync('script', userDraftPath)
 		})
+	} else {
+		console.log('[draft-sync] ScriptBuilder: bootstrap SKIPPED (content non-empty)', userDraftPath)
 	}
 
 	async function isTemplateScript() {
@@ -419,8 +429,16 @@
 		// doesn't run `inferArgs` on an empty `script.content` and toast
 		// "Could not parse code". If a template script is then loaded
 		// below we re-seed with the `templateScript=true` variant.
+		console.log('[draft-sync] initContent: SYNC seed content', userDraftPath, {
+			language,
+			template
+		})
 		script.content = initialCode(language, kind, template, false)
+		console.log('[draft-sync] initContent: awaiting isTemplateScript', userDraftPath)
 		const templateScript = await isTemplateScript()
+		console.log('[draft-sync] initContent: post-await', userDraftPath, {
+			hasTemplateScript: !!templateScript
+		})
 		if (templateScript) {
 			script.content = initialCode(language, kind, template, true)
 		}
diff --git a/frontend/src/lib/userDraft.svelte.ts b/frontend/src/lib/userDraft.svelte.ts
index ee6255a9e3..dd8585657c 100644
--- a/frontend/src/lib/userDraft.svelte.ts
+++ b/frontend/src/lib/userDraft.svelte.ts
@@ -444,8 +444,13 @@ export const UserDraft = {
 		const ws = resolveWorkspace(opts)
 		const mk = mapKey(ws, itemKind, path)
 		const entry = entries.get(mk)
-		if (entry) entry.syncSuspended = true
-		else pendingSuspensions.add(mk)
+		if (entry) {
+			entry.syncSuspended = true
+			console.log('[draft-sync] stopSync (entry live)', mk)
+		} else {
+			pendingSuspensions.add(mk)
+			console.log('[draft-sync] stopSync (queued, no entry yet)', mk)
+		}
 	},
 
 	/**
@@ -458,9 +463,13 @@ export const UserDraft = {
 	restartSync(itemKind: UserDraftItemKind, path: string, opts?: UserDraftOptions): void {
 		const ws = resolveWorkspace(opts)
 		const mk = mapKey(ws, itemKind, path)
-		pendingSuspensions.delete(mk)
+		const hadPending = pendingSuspensions.delete(mk)
 		const entry = entries.get(mk)
 		if (entry) entry.syncSuspended = false
+		console.log('[draft-sync] restartSync', mk, {
+			entryLive: !!entry,
+			clearedPending: hadPending
+		})
 	},
 
 	/**
@@ -642,8 +651,13 @@ function acquireEntry(
 	const existing = entries.get(mk)
 	if (existing) {
 		existing.count++
+		console.log('[draft-sync] acquireEntry: reuse', mk, { newCount: existing.count })
 		return
 	}
+	console.log('[draft-sync] acquireEntry: NEW', mk, {
+		hasSeed: defaultValue !== undefined,
+		pendingSuspended: pendingSuspensions.has(mk)
+	})
 	// Seed the cell with the caller's `defaultValue` (deep-cloned so the
 	// cell owns its copy and the caller's baseline can't alias it). This is
 	// how editors report the deployed/draft state until the user edits —
@@ -691,22 +705,42 @@ function acquireEntry(
 			const stored = cell.val
 			if (stored !== undefined) readFieldsRecursively(stored.value)
 			const next = stored === undefined ? undefined : JSON.stringify(stored)
-			if (next === lastSerialized) return
+			if (next === lastSerialized) {
+				console.log('[draft-sync] effect: no change', mk, {
+					nextLen: next?.length ?? 0
+				})
+				return
+			}
+			const nextLen = next?.length ?? 0
+			const diff = nextLen - (lastSerialized?.length ?? 0)
 			lastSerialized = next
 			if (skipNextWrite) {
 				skipNextWrite = false
+				console.log('[draft-sync] effect: SWALLOW (skipNextWrite seed)', mk, {
+					nextLen,
+					diff
+				})
 				return
 			}
 			const entry = entries.get(mk)
 			if (entry?.skipNextSync) {
 				entry.skipNextSync = false
+				console.log('[draft-sync] effect: SWALLOW (skipNextSync)', mk, { nextLen, diff })
 				return
 			}
 			// `syncSuspended` swallows the POST but still advances
 			// `lastSerialized` (above) so when sync resumes the next
 			// real change is detected as a change — only the writes
 			// made during suspension are dropped from the server's view.
-			if (entry?.syncSuspended) return
+			if (entry?.syncSuspended) {
+				console.log('[draft-sync] effect: SWALLOW (syncSuspended)', mk, { nextLen, diff })
+				return
+			}
+			console.log('[draft-sync] effect: POST', mk, {
+				nextLen,
+				diff,
+				stack: new Error().stack?.split('\n').slice(1, 6).join('\n')
+			})
 			void UserDraftDbSyncer.save({
 				workspace,
 				itemKind,
diff --git a/frontend/src/lib/userDraftDbSyncer.svelte.ts b/frontend/src/lib/userDraftDbSyncer.svelte.ts
index e2e33ae524..0fcee34861 100644
--- a/frontend/src/lib/userDraftDbSyncer.svelte.ts
+++ b/frontend/src/lib/userDraftDbSyncer.svelte.ts
@@ -147,6 +147,9 @@ const pendingSaveOpts = new Map<string, UserDraftDbSyncerSaveOpts>()
 
 async function postSave(opts: UserDraftDbSyncerSaveOpts): Promise<void> {
 	const key = draftKey(opts.workspace, opts.itemKind, opts.path)
+	console.log('[draft-sync] postSave START (sending POST)', key, {
+		valueIsNull: opts.value === null
+	})
 	try {
 		const resp = await DraftService.saveDraft({
 			workspace: opts.workspace,
@@ -169,8 +172,9 @@ async function postSave(opts: UserDraftDbSyncerSaveOpts): Promise<void> {
 		// newer `save()` that arrived during the POST replaces the entry
 		// and must survive for the next flush / debouncer round.
 		if (pendingSaveOpts.get(key) === opts) pendingSaveOpts.delete(key)
+		console.log('[draft-sync] postSave SUCCESS', key)
 	} catch (e) {
-		console.error('UserDraftDbSyncer.save failed', e)
+		console.error('[draft-sync] postSave FAILED', key, e)
 	}
 }
 
@@ -284,6 +288,10 @@ export const UserDraftDbSyncer = {
 
 	async save(opts: UserDraftDbSyncerSaveOpts): Promise<void> {
 		const key = draftKey(opts.workspace, opts.itemKind, opts.path)
+		console.log('[draft-sync] UserDraftDbSyncer.save called', key, {
+			immediate: !!opts.immediate,
+			valueIsNull: opts.value === null
+		})
 		// Track the latest unconfirmed save BEFORE entering the pipeline
 		// so the unload flush has something to send even if the page
 		// hides before the debouncer fires.
diff --git a/frontend/src/routes/(root)/(logged)/scripts/edit/[...path]/+page.svelte b/frontend/src/routes/(root)/(logged)/scripts/edit/[...path]/+page.svelte
index b344741eab..05a87f2c59 100644
--- a/frontend/src/routes/(root)/(logged)/scripts/edit/[...path]/+page.svelte
+++ b/frontend/src/routes/(root)/(logged)/scripts/edit/[...path]/+page.svelte
@@ -150,6 +150,7 @@
 		// fires. `initialPath = ''` also makes ScriptBuilder open the
 		// metadata drawer on mount. Strip the single-use flag last.
 		if (page.url.searchParams.get('new_draft') === 'true') {
+			console.log('[draft-sync] route: new_draft branch START', draftPath)
 			// Suspend autosave for the whole new-draft bootstrap: the seed
 			// `setDraftAndMeta` AND ScriptBuilder's `initContent` (which
 			// fills `script.content` from a template) are both
@@ -171,9 +172,11 @@
 			} as unknown as EditableScript
 			initialPath = ''
 			savedScript = structuredClone(empty)
+			console.log('[draft-sync] route: about to setDraftAndMeta(empty)', draftPath)
 			scriptHandle.setDraftAndMeta(empty, {})
 			fullyLoaded = true
 			renderEditor = true
+			console.log('[draft-sync] route: new_draft branch DONE', draftPath)
 			return
 		}
 		if (hash) {