Outcome wanted
SOURCES.md covers a fifth source register — tesserine/groundwork skills/reckon/SKILL.md §Navigational Principles — with every item classified per the established taxonomy (ascended / projection / retained / out of scope), and any content lacking a canonical home landed in the corpus per its document conventions. After this, no principle that groundwork's reckon directs reasoning from is homeless: each either lives here or is named methodology-local with a stated reason.
Why this exists (grounded)
Epic #1 synthesized four registers. Verified Jun 10 2026: a fifth exists. Groundwork's reckon skill carries five named principles — Parsimony, Elegance, Sufficiency, Traceability, Independence — explicitly defined as "first principles you reason FROM during reconstruction." That is this corpus's own discriminator for principle-hood (SOURCES.md: "a principle is a domain-neutral invariant reasoned from"). They were never classified, so reckon is today a second editable principle register — the exact condition the synthesis existed to end (Single Home).
Divergence is already observable, not merely risked:
- Reckon's Parsimony is defined as "one mechanism over two" — the corpus locates that invariant in Single Home (projection one mechanism, not two), not in Parsimony. The two registers disagree about which universal owns the maxim.
- Reckon's Sufficiency restates the Parsimony universal's "disciplined completeness" clause nearly verbatim, as a separate principle.
- The corpus's Parsimony document already claims sufficiency and elegance as faces of its one invariant; reckon lists them as three independent principles. Same material, different structure, no derivation between them.
Candidates for genuinely unique content, on first reading: Traceability (every inference earns its chain to ground or principle), Independence (reason from this problem's constraints, not an adjacent solution's), and possibly the form-isomorphic-to-problem content of Elegance (distinct in emphasis from the corpus's "shape compressed to what the need demands"). These observations are evidence for the classification, not predetermined dispositions — the per-item sort is the work, exactly as it was for registers 1–4.
Scope note on the drifted copy
pentaxis93/with-claude _shared/methodology/reckon.md is a diverged copy of the groundwork source (acknowledged in groundwork#327's out-of-scope note; divergence re-verified Jun 10). It is not a sixth register — its principle content classifies through the groundwork source, and its repair is the copy-vs-source defect, separate from this corpus work.
Acceptance criteria
- SOURCES.md contains a Register 5 section listing every item of reckon's Navigational Principles, each with exactly one classification and a destination (or stated reason, for retained / out of scope).
- Every ascended or attached item lands inside its destination principle document following the corpus conventions: the projection/corollary names its source register item, and the document's Relations and Sources sections are updated.
- If the classification produces a new universal, the README topology table includes it with its movement; if it produces none, the README requires no structural change.
- Each classification's reasoning is traceable to the discriminator (invariant reasoned-from vs. methodology instrument), stated in the SOURCES.md row or the destination document.
Downstream
A groundwork issue (filed next, linked here) re-points reckon's principle selection at this corpus and removes the restated register. It is gated on this issue landing — content unique to reckon must have a canonical home before reckon can consult instead of carry, or the wisdom is lost in the move.
Outcome wanted
SOURCES.md covers a fifth source register —
tesserine/groundworkskills/reckon/SKILL.md§Navigational Principles — with every item classified per the established taxonomy (ascended / projection / retained / out of scope), and any content lacking a canonical home landed in the corpus per its document conventions. After this, no principle that groundwork's reckon directs reasoning from is homeless: each either lives here or is named methodology-local with a stated reason.Why this exists (grounded)
Epic #1 synthesized four registers. Verified Jun 10 2026: a fifth exists. Groundwork's reckon skill carries five named principles — Parsimony, Elegance, Sufficiency, Traceability, Independence — explicitly defined as "first principles you reason FROM during reconstruction." That is this corpus's own discriminator for principle-hood (SOURCES.md: "a principle is a domain-neutral invariant reasoned from"). They were never classified, so reckon is today a second editable principle register — the exact condition the synthesis existed to end (Single Home).
Divergence is already observable, not merely risked:
Candidates for genuinely unique content, on first reading: Traceability (every inference earns its chain to ground or principle), Independence (reason from this problem's constraints, not an adjacent solution's), and possibly the form-isomorphic-to-problem content of Elegance (distinct in emphasis from the corpus's "shape compressed to what the need demands"). These observations are evidence for the classification, not predetermined dispositions — the per-item sort is the work, exactly as it was for registers 1–4.
Scope note on the drifted copy
pentaxis93/with-claude_shared/methodology/reckon.mdis a diverged copy of the groundwork source (acknowledged in groundwork#327's out-of-scope note; divergence re-verified Jun 10). It is not a sixth register — its principle content classifies through the groundwork source, and its repair is the copy-vs-source defect, separate from this corpus work.Acceptance criteria
Downstream
A groundwork issue (filed next, linked here) re-points reckon's principle selection at this corpus and removes the restated register. It is gated on this issue landing — content unique to reckon must have a canonical home before reckon can consult instead of carry, or the wisdom is lost in the move.