Field reportThe Base.

A coding assistant works in sessions. Each one holds the files it read, the commands it ran, the decisions it made, and it holds them only until it ends. The natural response is to keep one session open for days, which costs more every hour: a provider caches a long context for a short window, and after that window every message re-reads the whole history at full price. The author measured that spiral at about $38 a day before this system existed.03E00008 10400003 24844C10 00801025 03E00008 24844C10 27BD0018 24844C10 8FBF0014 00801025 8FB00010 0C0234B8 27BD0018 3C01800F 03E00008 0C0234B8 00801025 27BD0018 3C01800F 24844C10 27BDFFE8 27BDFFE8 3C01800F 0C01A2F4 27BD0018 AFB00010 03E00008 03E00008 27BD0018 27BDFFE8 0C0234B8 0085102B 0C0234B8 AFB00010 0085102B 3C048034 AFBF0014 0C01A2F4 8FB00010 00801025 0085102B 3C048034 0C0234B8 AFBF0014 24844C10 24844C10 00000000 AFB00010 0C01A2F4 3C01800F 8FBF0014 AFB00010 00801025 0C01A2F4 27BD0018 00000000 10400003 3C01800F

The fix is not a bigger window. It is to make every durable fact live in a file, give every file one delivery channel, and budget every channel. Then a session can close at any boundary: the digest is already on disk, the depth is in the notes, and the full transcript stays readable for ninety days. The next session opens with what matters already in its context and asks for nothing.8FBF0014 AFB00010 8FBF0014 03E00008 8FBF0014 3C048034 8FB00010 8FB00010 24844C10 03E00008 24844C10 0C01A2F4 03E00008 24844C10 10400003 24844C10 0C01A2F4 27BD0018 10400003 0C0234B8 00000000 00000000 27BDFFE8 0085102B 00801025 AFB00010 0C0234B8 8FB00010 10400003 00000000 AFBF0014 24844C10 00801025 AFB00010 AFBF0014 27BD0018 03E00008 00801025 00801025 00801025 27BD0018 AFBF0014 00801025 AFBF0014 8FBF0014 00000000 AFB00010 8FB00010 3C01800F 03E00008

Two definitions carry the whole design. Durable means a future session, or a person browsing the notes, would need it. Uncertain is not durable: a conclusion the assistant would not state as a fact goes to the status file with a review note, never to a memory tier, because recall here is keyword-matched with no staleness signal and a half-true note resurfaces later looking confirmed.8FBF0014 AFB00010 8FBF0014 03E00008 8FBF0014 3C048034 8FB00010 8FB00010 24844C10 03E00008 24844C10 0C01A2F4 03E00008 24844C10 10400003 24844C10 0C01A2F4 27BD0018 10400003 0C0234B8 00000000 00000000 27BDFFE8 0085102B 00801025 AFB00010 0C0234B8 8FB00010 10400003 00000000 AFBF0014 24844C10 00801025 AFB00010 AFBF0014 27BD0018 03E00008 00801025 00801025 00801025 27BD0018 AFBF0014 00801025 AFBF0014 8FBF0014 00000000 AFB00010 8FB00010 3C01800F 03E00008

1. Tier 1 always onThe index and the digest
   A memory index (identity, hard rules, pointers) and a status digest (open threads, next actions). Both load in full at every session start and again after the context is compacted.3C01800F 3C01800F 00000000 3C01800F 27BD0018 00801025 3C01800F 00000000 8FBF0014 0085102B 0085102B 27BDFFE8 03E00008 8FB00010 10400003 8FBF0014 3C048034 03E00008 3C01800F AFBF0014 27BDFFE8 3C048034 8FBF0014
2. Tier 2 on touchProject shims
   A one-kilobyte file per repository, scoped to its paths. It loads the first time a file in that repository is touched and points at the project's own status file and its governing skill.27BDFFE8 24844C10 0C01A2F4 0C0234B8 03E00008 0085102B 10400003 24844C10 AFBF0014 0085102B AFB00010 0085102B 0C01A2F4 0085102B 8FB00010 8FBF0014 03E00008 03E00008 24844C10 27BD0018 03E00008 27BD0018 27BDFFE8 10400003
3. Tier 3 just in timeTopic files, skills and the vault
   Per-project status, topic files, skills and about two thousand notes. Loaded on demand, through a pointer or a skill's trigger. A note nothing points at is invisible.10400003 8FB00010 8FBF0014 00801025 27BD0018 AFBF0014 24844C10 00801025 0085102B 03E00008 03E00008 03E00008 00000000 3C01800F 27BDFFE8 27BDFFE8 27BDFFE8 24844C10 00000000 0C01A2F4 AFB00010 3C01800F
4. Tier 4 archiveTranscripts
   Every session's full transcript, kept ninety days, never resident. A small, cheap model is pointed at one by its ID to recover decisions, threads and next steps.8FB00010 27BD0018 0085102B 0C0234B8 00801025 0C01A2F4 0C01A2F4 27BD0018 3C01800F 3C048034 27BD0018 3C048034 10400003 AFB00010 AFB00010 03E00008 8FB00010 00801025 AFBF0014 3C048034 00000000

What moves each tier

The always-on cost is about fifteen thousand tokens, around one and a half percent of a million-token window. The design leaves room to double that before it matters, and then refuses to, because every always-on line is a fixed attention tax on every task that follows.AFBF0014 AFB00010 00000000 0C01A2F4 8FBF0014 27BD0018 8FBF0014 00000000 0C01A2F4 0085102B 8FBF0014 00801025 8FBF0014 0085102B 00801025 00000000 0C01A2F4 3C01800F 0C01A2F4 AFB00010 8FBF0014 0085102B 27BD0018 00000000 8FBF0014 00000000 0C01A2F4 0085102B 00000000 10400003 10400003 8FBF0014 27BDFFE8 3C01800F 8FBF0014

Why the hard cap is hard

The memory index has a real cliff: past 25,000 bytes the harness truncates it silently, and pointers at the end of the file stop existing without an error. The status digest has no cliff, only a cost, since it is imported whole into every session. Treating the two with equal severity was a category error the system made for weeks: one is a safety rail, the other a cost control, and the rules for each differ.00000000 00000000 24844C10 3C01800F 0C01A2F4 03E00008 0085102B 3C048034 AFBF0014 3C01800F 27BDFFE8 8FBF0014 0085102B 0C01A2F4 0085102B 0085102B 8FB00010 0085102B 03E00008 27BD0018 AFB00010 8FB00010 10400003 27BDFFE8 27BD0018 27BDFFE8 8FBF0014 8FBF0014 3C048034 27BDFFE8 27BD0018 27BDFFE8 27BDFFE8 0C01A2F4 10400003 3C01800F 10400003 AFBF0014 10400003 AFBF0014 8FB00010 3C048034 8FB00010 27BD0018 8FB00010 00801025 0085102B 0C0234B8 27BD0018 3C01800F 8FBF0014 AFBF0014 3C048034

Volatile status

Focus, decisions this cycle, next actions, blockers, in-flight versions. The status digest; project detail goes to that project's own status file.8FB00010 0C01A2F4 3C01800F 3C048034 24844C10 0C01A2F4 0C01A2F4 00000000 24844C10 10400003 00000000 27BD0018 24844C10 0C0234B8 3C048034 27BDFFE8 0C01A2F4 00801025 8FBF0014

Hard guardrail

Safety, correctness, identity; must fire on every task. An atomic file and a one-line pointer in the index, in the top block. A hard rule scoped to one domain stays inline too, because a skill is not guaranteed to be invoked.00000000 10400003 27BDFFE8 AFBF0014 8FB00010 10400003 8FB00010 00801025 8FB00010 0085102B 10400003 27BD0018 0C0234B8 10400003 24844C10 0C0234B8 8FB00010 0085102B 0C0234B8 0C01A2F4 27BDFFE8 27BDFFE8 3C01800F AFB00010 03E00008 00801025 8FB00010 AFB00010 10400003

Soft domain rule

Style or method scoped to one work area. The matching skill's rules section, citing the atomic file. No index line.10400003 3C048034 27BD0018 0085102B 03E00008 27BD0018 10400003 00000000 3C048034 8FBF0014 00801025 3C048034 8FB00010 00801025 3C048034

Soft universal preference

Fires across many kinds of task. A compressed one-liner in the index under working preferences.00000000 3C01800F 27BDFFE8 24844C10 AFBF0014 8FBF0014 8FB00010 0C01A2F4 AFBF0014 0C01A2F4 3C01800F AFBF0014 3C01800F

Pattern or decision

A cross-project pattern with when to apply it; a significant decision with its rationale. Two topic files with line caps, archived to the vault when they overflow.3C048034 00000000 3C01800F 3C01800F 0C0234B8 0085102B 0C01A2F4 00801025 0C01A2F4 27BDFFE8 3C048034 8FBF0014 00000000 8FBF0014 0C0234B8 3C048034 10400003 00801025 8FB00010 AFB00010 10400003

Reference

Tools, methods, projects, people, meetings, diagrams. A vault note written through the vault's own tool, plus an inbound pointer from a file that loads.3C01800F AFB00010 AFBF0014 0C0234B8 00000000 00000000 00801025 8FB00010 8FB00010 10400003 AFBF0014 3C048034 00000000 AFB00010 00801025 3C01800F 00000000 0085102B 3C048034 3C048034

System structure

A machine, a network change, a backup topology, a scheduled job, a repository added or archived. The matching architecture document, reconciled, not a status line.3C048034 00000000 3C01800F 3C01800F 0C0234B8 0085102B 0C01A2F4 00801025 0C01A2F4 27BDFFE8 3C048034 8FBF0014 00000000 8FBF0014 0C0234B8 3C048034 10400003 00801025 8FB00010 AFB00010 10400003

Never the vault

Dumps of rows from work systems. They go to a downloads folder or a sheet; the vault holds method, decisions and conventions.00000000 27BD0018 27BD0018 03E00008 8FB00010 8FBF0014 AFB00010 27BD0018 3C01800F 24844C10 8FBF0014 03E00008 03E00008 27BDFFE8 8FBF0014 03E00008

Promotion, not prediction

The right home for a fact changes as the fact matures, so the system does not guess it at first sight. A new fact goes to the status digest, where it costs no permanent budget and is expected to churn. It earns an atomic file and an index pointer when it recurs across sessions and is confirmed, written opportunistically the next time the assistant is already writing about it. It becomes a vault note when it is reference-grade or crosses projects, and it is demoted or deleted when superseded.8FB00010 3C01800F 3C01800F 0C0234B8 0085102B 00801025 AFB00010 27BD0018 00801025 8FB00010 3C048034 3C01800F 0085102B 3C048034 00801025 0085102B 8FBF0014 3C048034 3C048034 3C048034 00801025 27BDFFE8 0C01A2F4 0C01A2F4 8FB00010 3C01800F 03E00008 3C01800F 3C048034 3C01800F 3C048034 24844C10 03E00008 00801025 10400003 27BD0018 27BD0018 AFB00010 3C048034 0C01A2F4 AFB00010 0C01A2F4 10400003 27BD0018 24844C10 0085102B 27BD0018 27BDFFE8 AFB00010 0085102B 0C01A2F4 8FB00010 0085102B AFBF0014 27BD0018 10400003 24844C10 27BDFFE8 10400003 27BD0018 8FB00010 0C0234B8 8FBF0014 27BD0018

Only two things ever earn a line in the always-on index: a rule that must fire on every task, and an identity fact. Everything else reaches its home through a pointer that already exists, at zero new index bytes. The test is a question: would this have to fire on a task where its topic file had not already been opened? The index stays flat by construction because every added line is paid for in the same pass by a line clustered, demoted or pruned, and the labour goes into the durable artifact rather than the index.00000000 8FB00010 03E00008 0C01A2F4 AFB00010 3C01800F AFBF0014 10400003 0085102B 3C048034 27BDFFE8 03E00008 0C01A2F4 00801025 00000000 00000000 8FB00010 10400003 0C0234B8 AFBF0014 8FBF0014 3C048034 AFB00010 0C01A2F4 8FBF0014 0C0234B8 AFB00010 00801025 3C048034 10400003 AFBF0014 AFBF0014 27BDFFE8 27BDFFE8 0C01A2F4 0C01A2F4 27BD0018 3C01800F 3C01800F AFBF0014 27BDFFE8 24844C10 27BDFFE8 8FB00010 3C048034 AFB00010 3C01800F 8FBF0014 0C01A2F4 8FB00010 0C01A2F4 03E00008 8FB00010 00801025 AFBF0014 27BDFFE8 3C048034 0C01A2F4 10400003 8FBF0014 00000000 03E00008 3C048034 24844C10 00801025 27BDFFE8 27BDFFE8

1. Pre-flight. Read the day's auto-logged note (the files touched, with the conversation as backfill). Read the capture buffer, where the assistant appended one line each time it reversed itself, fixed a failure, disproved a stale rule or found a flagged thing was fine; every line is a candidate, none auto-promotes. Measure the index and the digest in bytes before writing anything.8FBF0014 10400003 00000000 8FB00010 0085102B 0C01A2F4 8FBF0014 27BD0018 AFB00010 3C048034 27BD0018 3C048034 0C0234B8 AFBF0014 0C01A2F4 03E00008 27BD0018 AFBF0014 3C048034 3C048034 3C048034 AFB00010 27BDFFE8 03E00008 3C048034 00000000 0C0234B8 00000000 8FB00010 0085102B AFB00010 AFBF0014 00801025 24844C10 27BDFFE8 24844C10 8FBF0014 0085102B 0C0234B8 00000000 AFBF0014 10400003 AFBF0014 0C0234B8 3C048034 8FBF0014 00801025 AFB00010 8FBF0014
2. Audit and manifest. Sweep the session for durable knowledge and show a manifest before executing: update over create, one line per related change, every skip with a reason, every cold-tier create naming its inbound pointer. Ask once whether the session changed system structure.8FBF0014 27BDFFE8 AFBF0014 24844C10 0085102B 10400003 8FBF0014 00000000 3C01800F 00801025 27BD0018 10400003 27BDFFE8 0C0234B8 0C0234B8 03E00008 10400003 0085102B 24844C10 0C01A2F4 0C0234B8 24844C10 0C0234B8 10400003 3C048034 27BD0018 27BD0018 3C01800F 8FBF0014 8FBF0014 27BDFFE8 8FB00010 3C048034 0085102B 0085102B AFB00010
3. The handoff pass. For each block bound for the digest, an admission test: the work has no status file of its own; there is a next action within about two weeks; a session that never touches the project would still need it. A block that is only there because it feels important fails the third test. Then the next-session blocks, the session's name and ID written into the header, and the budget measured on both sides of the write.10400003 8FBF0014 8FBF0014 03E00008 8FB00010 0085102B 27BD0018 24844C10 0C01A2F4 27BDFFE8 AFB00010 10400003 00000000 27BDFFE8 03E00008 0C0234B8 03E00008 0C01A2F4 0C0234B8 0C0234B8 0085102B 27BD0018 AFB00010 0C0234B8 3C01800F 0085102B 24844C10 27BD0018 0085102B AFBF0014 8FBF0014 27BD0018 10400003 0085102B 0C0234B8 00000000 00801025 00801025 AFB00010 27BDFFE8 24844C10 0C0234B8 3C048034 0085102B 00801025 24844C10 00000000 00000000 AFB00010 AFB00010 AFB00010 24844C10 3C048034 AFBF0014 3C048034 AFBF0014
4. Execute and report. Vault notes through the vault's tool with the full body and a read-back; memory files through surgical edits, never a script, because a scripted edit is reverted by the harness and a second live session flushes its own copy over it. The report lists every write, every skip, and the sizes.0C0234B8 0085102B 00801025 AFB00010 00801025 3C01800F 8FBF0014 0C0234B8 8FB00010 00801025 00000000 3C048034 00801025 AFBF0014 27BD0018 10400003 0C01A2F4 03E00008 0C0234B8 03E00008 3C01800F 24844C10 3C048034 27BDFFE8 8FB00010 03E00008 27BD0018 8FB00010 AFB00010 AFB00010 24844C10 8FBF0014 3C048034 3C048034 AFB00010 10400003 27BD0018 AFBF0014 3C048034 03E00008

The admission test exists because the old rule did not work

The digest used to carry a post-hoc rule: measure after writing, relocate if over. It stayed over its target for weeks and grew four separate times in one day while that rule was in force. A cleanup instruction that runs after the damage is trivially skipped; a gate that runs before the write is not. The lesson generalises: constrain the writer, not the symptom.03E00008 03E00008 0085102B 8FBF0014 03E00008 27BD0018 8FB00010 0085102B 0C0234B8 27BD0018 24844C10 10400003 24844C10 27BD0018 3C01800F 0C0234B8 24844C10 0C01A2F4 3C048034 0085102B 3C048034 AFB00010 0085102B 8FBF0014 3C048034 00801025 3C048034 8FBF0014 8FBF0014 8FBF0014 03E00008 3C01800F 27BD0018 00801025 27BD0018 10400003 00000000 8FB00010 0C01A2F4 10400003 8FB00010 AFBF0014 8FBF0014 00801025 03E00008 8FB00010 AFB00010

Density, not bytes

When the digest was measured properly, 81 percent of its bytes were guard-bearing: rules, do-not-relitigate decisions, cold warnings. Only about five thousand bytes were pure status. Meeting a raw byte target would have meant deleting guards, the one class of content that must never be lost. So the invariant became composition: the share of bytes that carry a guard word. A dense file that is over the ceiling moves domain guards into the skill that owns them; a file whose density is falling has accumulated status and figures, and those compress.10400003 24844C10 27BD0018 3C01800F 0085102B 8FB00010 8FB00010 0085102B 3C048034 03E00008 0C0234B8 8FBF0014 AFB00010 24844C10 03E00008 8FB00010 27BDFFE8 0C0234B8 27BDFFE8 0085102B 8FB00010 0C01A2F4 03E00008 24844C10 AFB00010 27BD0018 3C01800F 0C0234B8 8FB00010 27BDFFE8 3C01800F 03E00008 8FB00010 10400003 24844C10 AFBF0014 AFB00010 00000000 00801025 27BD0018 3C048034 8FB00010 8FBF0014 8FBF0014 00000000 0C01A2F4 AFBF0014 8FB00010 0C0234B8 27BD0018 3C01800F 24844C10 8FB00010 0085102B 24844C10 03E00008 8FBF0014 AFBF0014 24844C10 AFBF0014 0085102B 0C0234B8 0085102B 0C01A2F4 3C01800F 00000000 AFB00010 3C048034 24844C10 3C048034 8FB00010

The first density metric was wrong in an instructive way. Its regular expression counted warning glyphs, so a bare warning symbol fired 39 times and a red circle 14 times, 53 of 77 matches on the digest. It measured whether the author had typed a glyph. The same file read 78 percent marked and 59 percent lexical once the glyphs were excluded. The lexical number is now the one reported, and no floor was set on it the day it changed: inventing a threshold on the day a metric is born repeats the mistake being fixed.AFB00010 00000000 8FB00010 3C01800F 3C048034 3C01800F AFB00010 3C048034 3C048034 10400003 03E00008 27BD0018 03E00008 AFB00010 AFB00010 00000000 0C0234B8 AFB00010 10400003 00801025 0085102B 0085102B 0085102B 3C048034 AFBF0014 10400003 00801025 3C048034 3C01800F 0C0234B8 0C01A2F4 AFBF0014 3C01800F 8FB00010 24844C10 3C01800F 24844C10 00801025 0C01A2F4 00000000 8FBF0014 0C01A2F4 03E00008 0085102B 03E00008 AFBF0014 27BD0018 AFBF0014 0085102B 3C048034 AFBF0014 AFBF0014 8FBF0014 10400003 8FB00010 24844C10 24844C10 10400003 03E00008 27BDFFE8 8FB00010 8FBF0014 00801025 27BDFFE8 00801025 10400003 0085102B

Mid-session, four triggers write one raw line each to an append-only buffer: a reversal (the assistant asserted one thing and the code showed another), a fail-to-fix (a command that failed and then worked, where the delta is the lesson), a stale-disproven (a document or rule proven wrong live), and a noop (something flagged as broken that turned out to be intentional). The buffer is a plain file with no validation, so the write is cheap enough to happen while the insight is fresh.00000000 03E00008 27BDFFE8 0085102B 27BD0018 AFB00010 8FB00010 0C01A2F4 10400003 0C01A2F4 24844C10 24844C10 00000000 0C0234B8 00000000 27BD0018 0C0234B8 3C048034 3C01800F AFBF0014 8FBF0014 27BD0018 0C0234B8 3C01800F 8FB00010 3C048034 0C01A2F4 8FBF0014 3C01800F 3C01800F 27BD0018 10400003 8FB00010 27BD0018 AFB00010 AFB00010 24844C10 3C01800F 0C01A2F4 8FB00010 03E00008 00000000 3C048034 10400003 00000000 AFB00010 3C048034 00801025 10400003 3C048034 24844C10 0C01A2F4 AFBF0014 00801025 8FBF0014 3C048034 3C048034 27BDFFE8 AFBF0014 3C01800F 27BD0018 00801025

Capture is not promotion. Self-corrections carry false positives at a rate the author put near one in six, so the checkpoint distils the buffer through the manifest with a review gate and then clears it back to its header. The buffer is multi-session safe because it is append-only: every live session adds its own lines and none rewrites another's.AFB00010 3C01800F 27BDFFE8 8FB00010 00000000 0085102B 0085102B AFB00010 AFB00010 8FBF0014 27BD0018 27BDFFE8 0085102B 27BDFFE8 AFB00010 00000000 27BDFFE8 8FB00010 10400003 10400003 0C01A2F4 0C0234B8 0C01A2F4 27BDFFE8 8FB00010 AFBF0014 00801025 10400003 0C01A2F4 27BD0018 03E00008 8FBF0014 8FB00010 00000000 AFBF0014 27BDFFE8 24844C10 10400003 27BD0018 AFB00010 00801025 0C0234B8 8FB00010 3C048034 03E00008

Sessions are disposable; knowledge is not. Closing a session loses nothing; opening one restores what matters automatically. So: work in short, named sessions, checkpoint at boundaries, and never idle-park a session out of fear.00000000 AFBF0014 24844C10 24844C10 8FB00010 AFB00010 AFB00010 3C048034 AFB00010 AFBF0014 8FBF0014 AFBF0014 8FBF0014 00000000 24844C10 03E00008 AFB00010 0085102B 0C01A2F4 8FBF0014 8FB00010 3C01800F 27BD0018 8FB00010 24844C10 27BD0018 24844C10 10400003 0C0234B8 24844C10

1. 28 Apr 2026
   An automatic skill-extraction system that minted a skill from every session gotcha is retired. The rule that replaced it: a gotcha is a one-liner first and a skill only after it recurs twice with a multi-step procedure.03E00008 3C01800F 8FBF0014 27BDFFE8 8FB00010 00000000 10400003 8FB00010 AFBF0014 00000000 AFB00010 0C01A2F4 03E00008 27BD0018 03E00008 AFB00010 00801025 00000000 24844C10 00801025 3C01800F 8FB00010 00000000 8FB00010 27BDFFE8 27BDFFE8 0C01A2F4 24844C10
2. 22 Jun 2026
   The memory index had become a content store. Thirty-one soft domain rules move into the skills that own them; the index returns to a pointer list with the hard guardrails hoisted to a top block. The configuration directory goes under local git.00000000 AFBF0014 3C01800F 0085102B 03E00008 27BD0018 03E00008 3C048034 0085102B 27BDFFE8 10400003 AFB00010 AFBF0014 3C01800F 27BDFFE8 AFBF0014 0085102B 10400003 24844C10 00000000 0C0234B8 AFBF0014 24844C10 10400003 10400003 10400003 00801025 27BDFFE8 0085102B 3C01800F 24844C10 00801025
3. 28 Jul 2026
   Continuity v2. The status digest moves from a start-of-session hook, capped at ten kilobytes and silently truncating, to the uncapped import in the user instructions file. Path-scoped shims give each repository its on-touch context. Transcripts are kept ninety days and a harvest command reads them.00801025 00801025 AFB00010 0085102B 03E00008 AFB00010 10400003 AFBF0014 24844C10 AFBF0014 8FBF0014 8FB00010 0C01A2F4 10400003 AFBF0014 3C01800F 0C0234B8 8FBF0014 24844C10 00801025 27BD0018 0C0234B8 0085102B 00000000 8FB00010 27BD0018 00000000 AFB00010 00801025 8FB00010 3C01800F 27BD0018 27BD0018 8FBF0014 10400003 00801025 00801025 27BD0018 24844C10
4. 29 Jul 2026
   A placeholder string passed as a note body overwrites a 126 KB note; the same day an unexpanded shell substitution wipes a 29 KB meeting note. The read-back after every write becomes routine.03E00008 AFBF0014 0085102B 3C01800F 10400003 03E00008 3C01800F 8FBF0014 AFB00010 AFBF0014 0085102B 00000000 00801025 8FBF0014 AFB00010 AFBF0014 8FBF0014 27BDFFE8 0085102B 8FBF0014 00801025 8FBF0014 27BDFFE8 00000000 27BD0018
5. 6 Aug 2026
   The digest grows four times in one day under a post-hoc cleanup rule. The admission test replaces it. The same day, picking the newest transcript file by time stamps the previous session's ID into the header; the session ID is read from the scratchpad path from then on.10400003 10400003 AFB00010 3C01800F 3C01800F 8FBF0014 0C0234B8 10400003 3C048034 AFBF0014 3C048034 8FB00010 03E00008 8FB00010 10400003 03E00008 0C01A2F4 8FBF0014 24844C10 27BDFFE8 00000000 24844C10 AFBF0014 0C0234B8 AFB00010 27BD0018 10400003 8FBF0014 0C0234B8 8FB00010 0085102B 0C0234B8 0C0234B8 0C01A2F4 0085102B
6. 19 Aug 2026
   The digest is measured at 81 percent guard-bearing bytes. A raw byte target is replaced by a density invariant and a cost ceiling.27BDFFE8 03E00008 27BD0018 00801025 27BD0018 AFBF0014 00801025 0085102B AFBF0014 8FB00010 AFBF0014 0C01A2F4 03E00008 3C048034 27BDFFE8 27BD0018 0085102B
7. 31 Aug 2026
   The density regular expression is found to be 69 percent glyphs. Density becomes two numbers, and the lexical one binds.8FBF0014 27BD0018 3C048034 0085102B 0085102B 24844C10 24844C10 AFBF0014 AFBF0014 AFB00010 8FBF0014 00801025 AFBF0014 27BDFFE8 0C01A2F4 8FB00010
8. 18 Oct 2026
   The checkpoint skill is rewritten from 40 KB of accreted rules to 20 KB with the same rules, tested against the same closing scenario before and after. This dossier is set from it.0C0234B8 24844C10 10400003 3C01800F 0C01A2F4 27BDFFE8 AFB00010 0C01A2F4 00000000 00801025 0C01A2F4 03E00008 00801025 8FB00010 0085102B 0085102B 8FB00010 10400003 27BD0018 27BDFFE8 24844C10 27BD0018 00801025

• 192
  atomic memory files, one fact each, among 207 files in the memory directory3C048034 00000000 03E00008 8FBF0014 0C0234B8 24844C10 00801025 3C048034 8FBF0014 00000000
• 23,390 B
  the index, over its 22,500 action line: a rebalance owed, the lever being domain rules into skills10400003 8FB00010 3C048034 8FB00010 3C048034 00801025 27BD0018 8FBF0014 27BD0018 00801025 27BDFFE8 27BD0018 00801025
• 28,564 B
  the digest, over its 28,000 ceiling by 564 bytes and under the hard stop0C01A2F4 27BD0018 0C0234B8 AFBF0014 0085102B 3C048034 3C048034 27BDFFE8 0085102B 8FB00010
• 37
  skills, 18 of them carrying a rules section folded in from memory3C048034 03E00008 03E00008 0C01A2F4 AFBF0014 8FB00010 0085102B 10400003 27BDFFE8
• 19
  project shims, for 43 project status directories27BD0018 0C01A2F4 03E00008 27BDFFE8 03E00008 03E00008 27BD0018
• 1,965
  vault notes00000000 3C048034 8FBF0014 3C01800F 03E00008 00000000
• 12
  hook scripts, among them a guard that blocks direct edits to the vault and one that archives every compaction summary3C01800F 3C01800F 24844C10 AFBF0014 AFBF0014 03E00008 3C048034 8FB00010 AFB00010 8FBF0014 8FB00010 AFB00010 03E00008 0085102B 0C0234B8
• 144 / 138
  lines in the patterns and decisions files, both at their caps24844C10 0C01A2F4 AFBF0014 AFBF0014 00801025 27BD0018 27BD0018 0085102B

Two of those numbers are red: the index and the digest are both over their lines on the day of counting. The system records that fact in the digest's own header rather than hiding it, because the next session needs the true figure, and the rule for the writer is net-zero at minimum: relocate at least what you add, in the same pass, before writing.8FBF0014 00801025 00000000 3C01800F 8FBF0014 3C01800F 0C01A2F4 27BD0018 27BD0018 10400003 10400003 0C0234B8 AFB00010 0C01A2F4 AFBF0014 03E00008 10400003 00000000 AFBF0014 0C0234B8 27BDFFE8 3C01800F 8FB00010 00801025 10400003 00000000 00000000 10400003 8FB00010 3C01800F 8FB00010 8FB00010 27BDFFE8 24844C10 10400003 10400003 03E00008 27BD0018 00000000 AFBF0014 8FBF0014 24844C10 8FB00010 AFB00010 0085102B

What it costs to run

The checkpoint takes a few minutes at each boundary and reads two files it did not write. The monthly audit skill checks staleness on declared dates, never on file modification times, because the author works on live projects from the home directory and a sync tool rewrites timestamps across machines; it also runs the density oracle and writes a report into the vault. The harvest of a dead transcript costs cents.0085102B 10400003 3C01800F AFBF0014 24844C10 00000000 10400003 00000000 0085102B 3C048034 3C01800F 0C0234B8 8FBF0014 00801025 24844C10 3C048034 AFB00010 00000000 24844C10 8FBF0014 0C01A2F4 AFB00010 10400003 3C048034 8FBF0014 0C0234B8 27BD0018 10400003 3C01800F 10400003 0085102B AFBF0014 3C048034 8FBF0014 8FBF0014 8FBF0014 27BDFFE8 24844C10 8FB00010 27BD0018 0C01A2F4 8FBF0014 0C0234B8 03E00008 3C01800F 10400003 27BDFFE8 8FB00010 3C048034 0C0234B8 AFB00010 3C01800F 8FB00010 27BD0018

A non-literal body wipes a note

The vault's write tool replaces the body verbatim. A placeholder, a template variable or a shell substitution passed as the body becomes the note. No size check fires. Type the body, read it back, count its bytes.00000000 0C0234B8 00801025 AFBF0014 03E00008 AFB00010 AFB00010 27BD0018 00000000 03E00008 0C01A2F4 3C01800F AFBF0014 3C048034 8FBF0014 27BDFFE8 0C01A2F4 0085102B 27BD0018 24844C10 AFBF0014 8FB00010 3C01800F 00000000 3C01800F 03E00008 00801025 00000000

The tool's index is a snapshot

A direct edit on disk is durable and visible to the always-fresh server, but the tool process keeps serving the old body until it restarts, and a rebuild does not refresh it. Never build an upsert from a read taken after a direct edit: it writes the stale body back.00000000 10400003 00000000 8FB00010 3C048034 8FBF0014 AFB00010 0085102B 27BD0018 00801025 0C01A2F4 AFB00010 3C048034 0C01A2F4 27BDFFE8 03E00008 27BDFFE8 AFB00010 3C048034 0085102B 0C01A2F4 10400003 03E00008 03E00008 0C0234B8 8FBF0014 3C01800F 24844C10 10400003 00801025 00801025 8FBF0014 10400003 3C01800F

Concurrent writers are real

The digest changed size between a read and the following write, twice in one day, with a peer session live on another machine. Prefer targeted edits; after any scripted edit, search for each change to prove it survived; say when peers are live, because the number moves.10400003 10400003 AFB00010 3C01800F 3C01800F 8FBF0014 0C0234B8 10400003 3C048034 AFBF0014 3C048034 8FB00010 03E00008 8FB00010 10400003 03E00008 0C01A2F4 8FBF0014 24844C10 27BDFFE8 00000000 24844C10 AFBF0014 0C0234B8 AFB00010 27BD0018 10400003 8FBF0014 0C0234B8 8FB00010 0085102B 0C0234B8 0C0234B8 0C01A2F4 0085102B

A thin commit is not a failed close

The configuration repository tracks only the memory directory and the architecture folders. One checkpoint routinely writes three stores while the log shows one slice, and a peer's add-all can sweep half-finished files into its own commit. Verify artifacts by their modification times, not the diff.03E00008 8FB00010 00801025 00801025 24844C10 AFBF0014 27BD0018 10400003 00000000 AFB00010 8FB00010 0085102B 0C01A2F4 0C0234B8 24844C10 0C01A2F4 AFB00010 00801025 00801025 27BDFFE8 00000000 3C01800F AFBF0014 AFBF0014 8FB00010 3C048034 0085102B AFB00010 03E00008 27BD0018 00000000 10400003 AFB00010 24844C10 3C048034 0085102B 8FB00010 0C0234B8 03E00008

An idle session closes against the layout it remembers

A session resumed after five days wrote to a skill file that a split had deleted in the meantime. Handoff targets are re-derived from the current layout, and a handoff that writes nothing because its substance already landed is a success.00000000 0C0234B8 24844C10 AFB00010 24844C10 3C048034 00801025 0C01A2F4 00801025 8FB00010 AFBF0014 8FB00010 0C0234B8 AFBF0014 8FBF0014 00801025 3C048034 3C048034 0085102B 27BDFFE8 27BDFFE8 27BD0018 00000000 0C0234B8 00000000 27BD0018 10400003 00801025 27BDFFE8 0C01A2F4 AFBF0014

Commit from one machine only

The repository's git directory is per-machine while the tracked folders sync between machines. A commit from the second machine forks the history.0C0234B8 27BDFFE8 0C01A2F4 3C01800F 0C01A2F4 3C048034 27BDFFE8 3C048034 0C0234B8 8FB00010 27BDFFE8 3C01800F 3C048034 10400003 0C0234B8 3C01800F 8FBF0014 0085102B 0C0234B8

Do not bundle rules to save bytes

Only the index and the digest load on their own. A universal rule folded behind one pointer with two others, or moved into a topic file, stops firing without any error. The one safe move is a domain rule into the skill that owns it.27BD0018 AFBF0014 00801025 8FBF0014 AFBF0014 3C01800F 0C0234B8 27BDFFE8 3C048034 8FB00010 10400003 10400003 27BDFFE8 AFBF0014 10400003 10400003 8FB00010 8FBF0014 8FB00010 00000000 27BDFFE8 00000000 24844C10 10400003 0085102B 3C048034 27BDFFE8 0085102B 0C01A2F4 3C048034

Gains

Lossless closing

A session can end at any boundary. The digest, the notes and the transcript hold everything a resume would have held, at a fraction of the cost of carrying the context.00801025 8FB00010 03E00008 AFBF0014 8FBF0014 27BD0018 27BD0018 0085102B AFB00010 24844C10 03E00008 0C0234B8 00801025 3C01800F 00801025 8FBF0014 8FB00010 3C048034 00801025 24844C10 00000000 8FB00010

Inspectable

Every fact is a line in a file a person can read, diff and delete. There is no embedding to explain and no ranking to second-guess.3C048034 8FBF0014 3C01800F 00000000 0085102B 03E00008 AFBF0014 00801025 0C0234B8 27BD0018 0C0234B8 8FB00010 0C0234B8 8FBF0014 0C0234B8 3C048034 00000000

Machine-independent

The whole system is a directory. It syncs between two machines and runs on a phone through a remote session on the smaller one.27BDFFE8 AFBF0014 0C0234B8 27BD0018 27BD0018 00000000 3C01800F 3C01800F 0C01A2F4 00000000 24844C10 27BD0018 3C01800F 27BDFFE8 AFBF0014 00801025 0085102B

Honest numbers

Budgets are bytes counted with a shell command. Density is a regular expression anyone can run. A red figure stays red in the file until it is fixed.0C01A2F4 AFBF0014 10400003 27BD0018 8FBF0014 24844C10 00801025 8FBF0014 27BDFFE8 00801025 24844C10 AFBF0014 AFBF0014 AFB00010 8FB00010 00000000 00000000 0C01A2F4 27BD0018 8FBF0014

Costs

Keyword recall misses synonyms

A memory file is found by the words in its description, so a description written as a summary rather than as the phrase the user would type is a file that never surfaces.00000000 0C0234B8 27BD0018 8FB00010 0085102B 8FBF0014 0085102B 8FB00010 8FBF0014 24844C10 10400003 10400003 AFBF0014 8FBF0014 00801025 0085102B AFB00010 0C01A2F4 8FB00010 8FBF0014 27BDFFE8 AFB00010

Discipline is the enforcement

The only writer of the digest is a skill, and a skill is invoked by an assistant under time pressure. The admission test and the red-flags list exist because the assistant negotiates with soft guidance.10400003 10400003 3C048034 27BDFFE8 27BDFFE8 AFBF0014 AFB00010 8FBF0014 0C0234B8 0C0234B8 0C01A2F4 10400003 AFB00010 0C0234B8 03E00008 00000000 27BD0018 3C01800F 8FB00010 27BD0018 00000000 0C0234B8 8FBF0014 0085102B 10400003 3C048034

Drift

Counts in guides go stale within weeks. The guide says so in its own summary and points at the digest as the figure of record.10400003 AFBF0014 00000000 27BD0018 24844C10 00801025 10400003 10400003 0C01A2F4 0C01A2F4 0C0234B8 24844C10 00801025 8FB00010 0085102B 24844C10 00801025

Two red numbers today

On the day of counting both always-on files were over their lines. The system knows; the rebalance is owed.8FB00010 8FBF0014 00801025 3C048034 AFB00010 00000000 03E00008 0C01A2F4 AFB00010 00801025 0C01A2F4 27BDFFE8 0C0234B8 27BDFFE8