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https://github.com/deepseek-ai/deepseek-harness
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The previous commit's `UNPRINTABLE` sentence said the raw-reach point for all three characters is `pyScalar`'s `JSON.stringify`, and the test comment said that route is the only one. Both are exclusive claims and both are false: the subscript tool-name comment calls `JSON.stringify` itself, and a tool name carrying NEL, LS, or PS always lands there, none of the three being `XID_Continue`. `pyScalar`'s own docstring already recorded that inheritance, so the file contradicted itself. Both sentences now name the two call sites. The note's evaluation axis was introduced as "the `typing` names the block spells", which excludes one of its own members (`A | B` is operator syntax) and omitted PEP 585 builtin generics — `dict[str, Any]` and `list[…]` appear in nearly every render and need 3.9. The axis is now "the names and syntax the block would evaluate at definition time", enumerated 3.8 through 3.11. The test title covered two of the three characters it asserts; NEL is NEXT LINE, neither a line nor a paragraph separator.
core/ — product API spine
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The session log, system-prompt assembly, tool registry, agent vocabulary, and concrete loop that form the harness's default control spine. These are product packages — the stable surface plugins and consumers build against.
| Package | Role | ctx key |
|---|---|---|
scope/ |
Scoped-context registration primitive | library — no ctx key |
session/ |
Event-sourced session log and in-memory store | ctx.sessions |
system-prompt/ |
Prompt and tool-schema assembly registry | ctx.systemPrompt |
tools/ |
Scoped tool registry and execution pipeline | ctx.tools |
agent/ |
Agent interface, registry, and event vocabulary | ctx.agents |
agent-loop/ |
Default concrete agent driver | ctx.agentLoop |
scope supplies the shared scoping primitive. agent owns the public seam, while agent-loop is its default implementation; extension plugins depend on the seam so the driver remains swappable.
Runnable compositions belong to examples/agent-spine-demo; this group owns only the swappable spine pieces.