issue(strategy-curator): tag input swallows commas into one mega-tag

Typing a comma-separated tag list saves it as ONE dashed token because
toDashed splits on any non-alphanumeric run (commas and spaces alike) and
hyphen-joins the lot. Both entry points — TagBar's applyTag and
StrategyPicker's addTag — feed the whole raw entry in as a single tag.
Surfaced live curating the Quantum Innovation thesis. Documents root cause,
expected behavior (commas separate, spaces join), and the splitTags fix.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_018UYTYu4MAFZ7iyr2VTo2kq

Author: mpstaton

context-v/issues/Tag-Input-Swallows-Commas-Into-One-Mega-Tag.md

@@ -0,0 +1,86 @@
+---
+title: "Tag input swallows commas into one mega-tag — commas should split into separate tags"
+lede: "Typing 'Quantum-Computing, Quantum-Innovations, Computational-Biology' into a tag field saves it as ONE tag, 'Quantum-Computing-Quantum-Innovations-Computational-Biology', because toDashed treats commas exactly like spaces. Commas should be tag separators, spaces the word-joiners."
+date_created: 2026-08-02
+date_modified: 2026-08-02
+authors:
+  - Michael Staton
+augmented_with:
+  - Claude Code on Claude Opus 4.8
+semantic_version: 0.0.0.1
+tags:
+  - Issue
+  - Augment-It
+  - Strategy-Curator
+  - Tags
+  - Bug
+status: Resolved
+---
+
+# Tag input swallows commas into one mega-tag
+
+## Why Care?
+
+Surfaced live on 2026-08-02 while curating the "Quantum Innovation &
+Computational Biology" thesis: the source
+`biology-begins-to-tangle-with-quantum-computing` ended up with the tag
+`Quantum-Computing-Quantum-Innovations-Computational-Biology` — three
+intended tags fused into one — plus a stray `Quantum-Computing`. Edit mode
+then rendered the fused value as one oversized chip. The operator had
+typed commas; the input ignored them.
+
+## Root cause
+
+`toDashed` (`apps/strategy-curator/src/curation.svelte.ts`) is the culprit:
+
+```ts
+export function toDashed(s: string): string {
+  return s.trim().split(/[^a-zA-Z0-9]+/).filter(Boolean).join('-');
+}
+```
+
+It splits on **any** non-alphanumeric run — spaces *and* commas alike —
+then hyphen-joins everything back. So a whole comma-separated entry becomes
+a single dashed token.
+
+Both tag entry points feed the *entire* raw input straight into it as one
+tag, with no comma-splitting:
+
+- **Source edit:** `TagBar.svelte` → `curation.applyTag(raw)` → `toDashed(raw)` → one `tag.apply`.
+- **Corpus create:** `StrategyPicker.svelte` `addTag(t)` → `toDashed(t)` → one `pendingTags` entry.
+
+(The Authors field, by contrast, *does* comma-split — the inconsistency the
+operator reasonably expected the tag field to share.)
+
+## Expected behavior
+
+Commas (and newlines) are **tag separators**; spaces within a segment stay
+**word-joiners** (dashed). So:
+
+> `Quantum Computing, Computational Biology` → `["Quantum-Computing", "Computational-Biology"]`
+
+Pasting a comma-separated list into either tag field should create multiple
+distinct chips, deduped, each Train-Case-dashed.
+
+## Fix
+
+Add a `splitTags(raw): string[]` helper next to `toDashed` (split on
+`[,\n]+`, `toDashed` each segment, drop empties), and route both entry
+points through it:
+
+- `applyTag` loops over `splitTags(raw)`, firing one `tag.apply` per new tag.
+- `StrategyPicker.addTag` appends every `splitTags(t)` result to `pendingTags`.
+
+Suggestion-click paths pass a single token, which `splitTags` returns
+unchanged — no regression.
+
+## Resolution
+
+Fixed 2026-08-02. Note the runtime fix only reaches augment.didi.sh after a
+strategy-curator rebuild + redeploy; the already-mangled data on existing
+records is corrected separately (the Quantum source's tags were repaired
+directly in the canonical layer the same day).
+
+## See also
+
+- [[feedback_tags_train_case]] — the Train-Case convention this preserves.