[andyhsu6]

Closes #293.

Problem

A generated chapter invented three place names absent from the preceding 58 chapters. Invented names are not wrong by themselves — the story has to leave the county — but they enter canon through analysis (chapter → facts → world settings → next prompt) and compound.

Balance: three tiers, not a ban

1. Reuse established names. People, aliases, organisations, and the current outline's own names are injected as a short block near the end of the prompt.
2. New stage names: allowed, anchored, budgeted. At most 2 per chapter, each carried by an anchor ("three days by water from X", "a branch of Y").
3. One-off elements stay generic ("a neighbouring town"), because naming invites reuse and re-discovery by later chapters.

Implementation

• app/services/prompt_names.py builds the block from characters (name/aliases/organisation flag) plus the chapter's outline (characters, scenes, title), with hard caps (12 people, 8 orgs, 8 outline names, 4 scenes, 2 aliases each) so the block stays ~300 characters.
• Wired into the three chapter generation paths immediately before the writing-spec tail (so style still sits last).
• Source guard asserts all three call sites; a behavioural test cannot catch a missing injection.

Verification (same chapter, before → after)

	before	after
invented place names	3	0
established names used	partial	county, inn, hall, existing cast
avg sentence	27.7	23.8
dialogue ratio	0.33	0.42

Naming stabilised. The style numbers moved in the worse direction on this single sample (the chapter is interrogation-heavy), so I am not tuning style from it — that needs a few samples to separate scene effect from drift.

.venv/bin/python -m pytest tests/test_prompt_names.py tests/test_chapter_output_budget.py -q → 15 passed
.venv/bin/python -m pytest tests/ -q -p no:cacheprovider                              → 1669 passed

Desensitized per repository policy: no source text, titles or character names are included.