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REVIEW 3 major objections 5 minor 2 cited by

A Mathematical Framework for AI-Human Integration in Work

T0 review · 3 major / 5 minor · reviewed 2026-08-07 · deepseek-v4-flash

Pith's one-line read This paper shows that job success probability can flip from near zero to near one when decision ability crosses a critical threshold, and that merging a strong planner with a strong executor can outperform either worker alone.

desk verdict Clean formal model with a missing steepness hypothesis and overstated empirical claims; worth refereeing with major revision. read the letter →

arxiv 2505.23432 v2 pith:BM6U3UAB submitted 2025-05-29 cs.AI cs.CYecon.GNq-fin.EC

classification cs.AIcs.CYecon.GNq-fin.EC
keywords human-AIcollaborationjobsuccessprobabilitydecisionandactionsubskillsphasetransitionproductivitycompressionworker-jobfitabilitynoisesubskilldecomposition
verification ladder T0 review T1 audit T2 compute T3 formal

The pith

A machine-rendered reading of the paper's core claim, the machinery that carries it, and where it could break.

The reading

The paper builds a mathematical model of a job as a collection of tasks, each requiring skills that split into decision-level subskills (figuring out what to do) and action-level subskills (carrying it out). A worker, human or AI, has separate ability profiles for these two kinds of subskills, and the job succeeds when the aggregated error stays below a threshold. The central result is a threshold theorem: for a fixed job, action ability, and noise level, small increases in decision ability around a critical value flip the success probability from at most theta to at least 1 minus theta. A second result gives conditions under which combining a worker strong in decision subskills with one strong in action subskills beats the better individual worker by a large margin. The paper argues this explains why AI assistance compresses productivity gaps and shows the framework can be instantiated with occupational data and language-model benchmark scores.

What carries the argument

The engine is the pair of ability profiles $(\alpha_1, \alpha_2)$ mapping subskill difficulty to a distribution of performance, with decision-level and action-level subskills aggregated through monotone skill, task, and job error functions. The threshold behavior is driven by comparing the expected job error $Err_{avg}$ to the success threshold; a concentration bound converts closeness of $Err_{avg}$ to threshold into a bound on the success probability. The transition width is $\gamma_1 = L \sqrt{MaxDisp \ln(1/\theta)} / MinDer$, where $MinDer$ is the infimum over decision ability of the absolute derivative of $Err_{avg}$ with respect to that ability, and $MaxDisp$ aggregates the subgaussian dispersion of the noise. The merging result works by placing one worker's success probability below $\theta$ and the merged worker's above $1-\theta$ through the same concentration argument.

What would settle it

A reader could compute the expected job error for a specific job and ability profile, identify the critical ability $\mu_c$, then measure the success probability at $\mu_c$ plus and minus the predicted $\gamma_1$; if the success probability remains intermediate at both points rather than dropping below $\theta$ or rising above $1-\theta$, the threshold claim is contradicted.

Watch

Extended reading notes

Core claim

On the paper's own terms, the core claim is Theorem 3.2: there is a critical decision ability $\mu_c$ determined by where the expected job error equals the success threshold, and a derived transition width $\gamma_1$, such that the job success probability is at most $\theta$ below $\mu_c - \gamma_1$ and at least $1-\theta$ above $\mu_c + \gamma_1$. This makes job success look like a phase transition rather than a smooth ramp. The related Theorem 3.3 shows that if one worker's decision ability is sufficiently above another's while the second worker's action ability is sufficiently above the first's, then using the first worker's decision profile with the second worker's action profile gives a success probability at least $1-2\theta$ higher than relying on the second worker alone. The paper also derives productivity compression as a corollary: an AI assistant with strong action-level subskills narrows the gap between lower- and higher-skilled workers, matching field observations.

Load-bearing premise

The theorems require the expected job error to change steeply enough with decision ability, meaning its derivative must stay bounded away from zero across the relevant range; if the error curve is locally flat, the transition window can widen without bound and the sharp flip can disappear.

Editorial extensions

If this is right

  • Near the critical decision ability, a small gain in ability or a small reduction in noise can raise success probability from below $\theta$ to above $1-\theta$, so targeted upskilling has a cliff-like payoff.
  • Pairing a strong decision-maker with a strong executor can yield a success probability at least $1-2\theta$ higher than the better individual worker, formalizing superadditive human-AI collaboration.
  • If two workers share the same decision ability but differ in action ability, adding a strong-action AI assistant narrows their success-probability gap, reproducing the productivity compression observed in field studies.
  • A slight underestimation of decision ability can classify as failures workers whose true success probability is near 1, so evaluation bias can invert hiring decisions even when the bias is small.
  • Strong dependencies between subskill noise widen the transition, meaning that reducing skill interdependencies makes ability improvements more effective.

Reading between the lines

Editorial extensions of the paper, not claims the author makes directly.

  • Editorial inference: the threshold mechanism is generic to any monotone aggregate of many noisy subskill errors, so similar cliffs could appear in team performance, software quality, or any KPI composed of many components; the paper only demonstrates it for jobs.
  • Editorial inference: if the model is right, the distribution of success outcomes should be bimodal near the critical ability level, with most workers either clearly succeeding or clearly failing rather than clustering around the threshold.
  • Editorial inference: the derivative analysis suggests that noise-reduction interventions such as standardized workflows can substitute for ability training, an implication the paper only touches on in its intervention plots.
  • Editorial inference: the trust-parameter simulation implies that overestimating an AI's action ability can turn a merging gain into a loss, so accurate ability estimation is a practical precondition for realizing the superadditive benefit.
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Editorial analysis

A structured set of objections, weighed in public.

Desk editor's note, referee report, and a circularity audit.

Referee Report

3 major / 5 minor

Summary. The paper introduces a formal model in which each job skill is decomposed into a decision-level and an action-level subskill, and workers are represented by stochastic ability profiles over subskill difficulty. Error aggregation across subskills, skills, tasks, and jobs yields a job success probability P. The main theoretical results are (i) Theorem 3.2, a phase-transition bound asserting that P is below theta below a critical decision ability and above 1-theta above it, with a transition width gamma_1; (ii) Theorem 3.3, sufficient conditions for a merged worker with complementary decision/action abilities to outperform the best single worker by at least 1-2theta; and (iii) Corollary 3.4, a productivity-compression lower bound. The paper then calibrates the model to O*NET and BIG-bench Lite data and presents simulations for job-worker fit, merging, and robustness to alternative modeling choices.

Significance. The concentration-based proof of Theorem 3.2 is a genuine contribution: it connects Lipschitzness, noise independence, and subgaussian dispersion to a quantitative threshold, and the scaling gamma_1 ~ sigma sqrt(ln(1/theta)/n) for linear profiles is a falsifiable prediction. The merging theorem gives a formal sense in which complementary profiles can be superadditive, which is directly relevant to human-AI collaboration. The empirical calibration is useful as an illustration of how the framework can be instantiated, but it is not an independent validation because the same model outputs are used to fit key parameters. The stated generality of the main theorem is not supported as written: the transition width requires a strictly positive derivative lower bound, and the paper's own polynomial-profile analysis shows that this assumption can fail.

major comments (3)
  1. [Theorem 3.2 and Appendix B.2] The statement of Theorem 3.2 defines gamma_1 by dividing by MinDer_mu1 but never states MinDer_mu1 > 0 as a hypothesis. This is not a technicality: Lemma B.3 converts the vertical gap t into a horizontal window of width t/MinDer by integrating the derivative lower bound over [mu1, mu_c1]; if the infimum of |partial Erravg / partial mu1| over mu1 >= 0 is zero, no finite gamma_1 is obtained. For the polynomial profiles analyzed in B.2, partial Erravg / partial beta1 = (beta1 / 2n) sum_j s_{j1}^{beta1-1}, which equals 0 at beta1 = 0, so MinDer = 0 and gamma_1 = infinity. The proposed local repair, restricting to [beta_c1 - gamma_1, beta_c1 + gamma_1] and assuming a derivative bound there, is circular because the interval is defined through the very gamma_1 being bounded. Add an explicit global or local steepness hypothesis to Theorem 3.2 (and to Theorem 3.3, Corollary 3.4, and Theorem B.7, which inherit gamma_1), and either prove existence of a local interval satisfying the bound or state the polynomial-profile result as conditional. The same hypothesis is also needed to justify the asserted uniqueness of mu_c1.
  2. [Section 3.2, 'Generalization'] The main text claims that the analysis extends to constant and polynomial profiles, but for polynomial profiles the only derivation is the conditional one in Appendix B.2. The bound gamma_1 <= sigma sqrt(2n ln(1/theta) / sum_j s_{j1}) is derived under the assumption [beta_c1 - gamma_1, beta_c1 + gamma_1] subset [0.5, 2] and a resulting derivative lower bound of (1/4n) sum_j s_{j1}; no argument shows that the fixed point gamma_1 satisfying this containment exists. As written, the 'Generalization' paragraph overclaims the scope of Theorem 3.2.
  3. [Section 3.1 and Lemma B.3] The proof of Lemma B.3 invokes Proposition A.1 to couple the subskill draws under two ability parameters and conclude monotonicity of Erravg. Proposition A.1 is proved only for constant, linear, and polynomial families with uniform noise, while Theorem 3.2 is stated for general ability profiles parameterized by mu1. If the theorem is intended for arbitrary profiles, the stochastic-dominance condition should appear as an explicit assumption; otherwise the proof covers only the restricted families. This is separate from the MinDer issue but equally needed for the theorem statement to match its proof.
minor comments (5)
  1. [Abstract and throughout] The benchmark name is written both as 'Big-bench Lite' and 'BIG-bench Lite'; please use a single consistent spelling. There are also minor typographical issues such as missing spaces in 'productivity compression' in the abstract.
  2. [Section 3.2, Theorem 3.2] The definition of gamma_1 in Theorem 3.2 uses n(sigma_1^2 + sigma_2^2), whereas the generalized Theorem B.1 uses MaxDisp. For uniform noise, the bound on MaxDisp is n(sigma_1^2 + sigma_2^2)/4, so the two statements are not obviously consistent. Please clarify which noise model the main theorem targets or replace n(sigma_1^2 + sigma_2^2) by an explicit MaxDisp expression.
  3. [Section 4.1] The decision-level degree vector lambda and the task-skill dependencies T_i are generated by GPT-4o; the paper should state explicitly that these are model-generated estimates rather than ground truth, and ideally report sensitivity to the prompt or an inter-rater agreement measure.
  4. [Section 4.3] The text refers to 'Figure 4.2' when plotting Pmerge and Delta; this should be 'Figure 4' or a specific panel label. Also, the notation Pmerge is used in captions before being defined in the text.
  5. [Section 5] The limitations paragraph lists data and cost considerations but does not mention the mathematical restriction imposed by MinDer > 0 or the stochastic-dominance requirement. Adding these would give readers an accurate picture of the theorem's scope.

Circularity Check

1 steps flagged · score 4.0 of 10

Main theorems are self-contained, but the polynomial-profile generalization in Appendix B.2 bounds γ1 using an interval defined by γ1 itself, and Theorem 3.2 omits the MinDer>0 hypothesis its own polynomial example violates.

  1. self definitional [Appendix B.2, 'Analysis for polynomial profiles'; referenced by Section 3.2 'Generalization']
    "Note that this partial derivative is 0 when β1 = 0, which results in MinDerβ1(σ, β2, σ) = 0 and γ1 =∞. However, by the proof of Theorem B.1, it suffices to bound the partial derivative for β1 ∈ [βc1−γ1, βc1+γ1] instead of the entire domain R≥0. Suppose we know that [βc1−γ1, βc1+γ1] ⊆ [0.5, 2]; this implies that ... Thus, we have the following bound for γ1: γ1 = L sqrt(0.5nσ2 ln(1/θ)) / (1/(4n) Σ sj1) ≤σ·sqrt(2n·ln(1/θ)/Σ sj1)."

    The claimed polynomial-profile bound for γ1 is derived on the interval [βc1−γ1, βc1+γ1], whose endpoints are functions of γ1 itself. The paper first observes that the global MinDerβ1 is 0 for polynomial profiles, making the theorem's γ1 infinite. The repair then restricts attention to an interval whose location depends on the unknown γ1 and assumes the interval lies inside [0.5,2] without a fixed-point or existence proof. In effect, the argument assumes the smallness of γ1 that it claims to derive, so the extension of Theorem 3.2 to polynomial profiles is supported only by a self-referential construction rather than by an independent bound.

full rationale

The central theorems (Theorem 3.2, Theorem 3.3, Corollary 3.4) are derived from the stated Lipschitz, monotonicity, noise-independence, and stochastic-dominance assumptions via McDiarmid's inequality and elementary calculus; no fitted parameter enters the proofs, so the main derivation is self-contained. The one genuine circular step is in Appendix B.2, where the polynomial-profile transition width γ1 is bounded using an interval [βc1−γ1, βc1+γ1] whose definition involves γ1 itself. Since the paper's own computation gives MinDerβ1 = 0 for polynomial profiles, the theorem's global γ1 is initially infinite, and the repair simply assumes the smallness to be proved. This makes the Section 3.2 'Generalization' claim for polynomial profiles unsupported. Separately, Theorem 3.2 states γ1 with MinDer in the denominator without requiring MinDer > 0 as a hypothesis; for the paper's polynomial family MinDer = 0, so the theorem as stated is vacuous there. That is a correctness gap rather than a circularity. The empirical section instantiates the same model with Big-Bench/O*NET parameters and then illustrates the theorems by simulation; this is not an external validation and is mildly self-referential, but it is not a circular derivation. No load-bearing self-citation or imported uniqueness theorem was found.

Assumptions & free parameters 9 free parameters · 5 assumptions · 1 invented entities

The central theorems rest on a small set of structural assumptions: independence, monotonicity, Lipschitzness, and a uniform steepness lower bound. The empirical sections add several fitted or hand-chosen parameters: abilities fitted to Big-Bench Lite, λ and task-skill dependencies from GPT-4o, and τ and σ chosen by hand. No new physical entities are introduced; the subskill decomposition is a conceptual construct without direct independent measurement.

free parameters (9)
  • human ability parameter a (slope 1-a = 0.78) = a = 0.22
    Fitted to Big-bench Lite average human rater accuracies (Appendix D.2); defines W1's ability profile in Section 4. The '+0.22' in Eq. (9) appears to be a typo for this parameter.
  • GenAI ability parameter a (slope 1-a = 0.92) = a = 0.08
    Fitted to the best LLM (PaLM) accuracies in Big-bench Lite (Appendix D.2); defines W2's profile.
  • human skill-noise variance = 0.013 (skill level), 0.0065 per subskill
    Estimated variance around the fitted human ability line (Appendix D.2); used in subsequent simulations.
  • GenAI skill-noise variance = 0.029 (skill level), 0.0145 per subskill
    Estimated variance around the fitted LLM ability line (Appendix D.2).
  • decision-level degree vector lambda = 18 values listed in Eq. (10)
    Generated by GPT-4o from O*NET skill descriptions; determines subskill difficulties and hence the job error function.
  • task-skill dependency sets T_i = 17 tasks mapped to subsets of [18], listed in Appendix D.3
    Generated by GPT-4o; determines which skills enter each task and the weights in Eq. (13).
  • success threshold tau = 0.45
    Chosen by hand as a medium job requirement (Section 4.1); P1 and P2 values are sensitive to it.
  • noise level sigma in Section 4 simulations = 0.08
    Default noise parameter chosen for the Computer Programmers example; robustness checks vary it.
  • dependency parameter p in Section 4.2 = swept in [0,1]
    Controls correlation of subskill errors; not fitted, but the phase-transition conclusions depend on it.
assumptions (5)
  • domain assumption Noise independence (Assumption 3.1)
    All subskill error rates are independent draws given ability profiles; central to the McDiarmid concentration argument in Theorem 3.2. Relaxed in Section 4 and Appendix B.5.
  • domain assumption Monotone error aggregation and L-Lipschitz Err
    Assumed in Section 3.1; needed for the concentration inequality and for monotonicity of P with respect to ability.
  • ad hoc to paper Global steepness MinDer > 0
    The transition width uses the infimum of |∂Erravg/∂µ1|; for polynomial profiles the derivative is zero at β=0, so Theorem 3.2 is vacuous unless restricted to an interval where a positive bound holds (Appendix B.2).
  • ad hoc to paper Subskill complementarity and extreme-point allocation (Assumptions D.1-D.3)
    Imposed to split skills so that sj1+sj2=sj and λj=0 or 1 maps to extreme subskill difficulties; not independently justified by data.
  • domain assumption P proportional to RPH
    Assumed in Section 3.4 to connect job success probability to the productivity measure in [16]; no empirical evidence is given for this proportionality.
invented entities (1)
  • decision-level and action-level subskills
    purpose: Splits each skill into problem-solving and execution components so that human and AI strengths can be recombined.
    This is a modeling construct. The paper assigns extreme λ values to inseparable skills and uses GPT-4o judgments for the rest, but provides no direct measurement separating the two subskills.

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Cite this review

Pith. "Pith review of A Mathematical Framework for AI-Human Integration in Work." pith.science (2026). https://pith.science/paper/BM6U3UAB

@misc{pith2026250523432,
  author       = {Pith},
  title        = {Pith review of: A Mathematical Framework for AI-Human Integration in Work},
  year         = {2026},
  howpublished = {\url{https://pith.science/paper/BM6U3UAB}},
  note         = {Machine review of arXiv:2505.23432}
}
read the original abstract

The rapid rise of Generative AI (GenAI) tools has sparked debate over their role in complementing or replacing human workers across job contexts. We present a mathematical framework that models jobs, workers, and worker-job fit, introducing a novel decomposition of skills into decision-level and action-level subskills to reflect the complementary strengths of humans and GenAI. We analyze how changes in subskill abilities affect job success, identifying conditions for sharp transitions in success probability. We also establish sufficient conditions under which combining workers with complementary subskills significantly outperforms relying on a single worker. This explains phenomena such as productivity compression, where GenAI assistance yields larger gains for lower-skilled workers. We demonstrate the framework' s practicality using data from O*NET and Big-Bench Lite, aligning real-world data with our model via subskill-division methods. Our results highlight when and how GenAI complements human skills, rather than replacing them.

Figures

Figures reproduced from arXiv: 2505.23432 by the authors.

Figure 1
Figure 1. Plots illustrating the relationship between the success probability P(α1, α2, h, g, f, τ ) and the parameters a1, σ for the linear ability example of Theorem 3.2 with default settings of (n, m, τ, a2) = (20, 20, 0.25, 0.4) and subskill numbers sjℓ ∼ Unif[0, 1]. Theorem 3.2 shows that increasing µ1 by approximately 2γ1 transitions the success probability P from at most θ to at least 1−θ. A smaller value of γ1 implies… view at source ↗
Figure 2
Figure 2. Heatmaps of the probability gain ∆ = max {P1, P2, P12, P21} − max {P1, P2} by merging two workers for different ranges of (a (2) 1 , a (2) 2 ) for the linear ability example of Theorem 3.3 with default settings of (n, m, σ, τ ) = (20, 20, 0.5, 0.25). The region enclosed by the dotted lines in each heatmap indicates where the corresponding job success probability is the highest among the four. For instance, in [PITH… view at source ↗
Figure 3
Figure 3. Plots illustrating the relationship between the success probability P(α1, α2, h, g, f, τ ) and the ability parameter a and dependency parameter p for the Computer Programmer example with default settings of (σ, τ ) = (0.08, 0.45). λ = (0, 0, 1, 1, 1, .6, .7, .4, .4, 0, .3, 1, 1, .6, .7, .6, 0, .4). Using a skill proficiency sj and its decision-level degree λj , we compute subskill numbers as sj1 = λjsj , sj2 = 1 − (… view at source ↗
Figures from the paper (20 more)
Figure 4
Figure 4. Figure 4: Heatmaps of the merged job success probability Pmerge and the corresponding probability gain ∆ = Pmerge − max{P1, P2}, shown across different values of the ability parameters (a, c) for the Computer Programmers example with default threshold τ = 0.45. Rapid color trans…
Figure 4
Figure 4. Figure 4: plots the heatmaps of job success probability [PITH_FULL_IMAGE:figures/full_fig_p015_4.png]
Figure 5
Figure 5. Figure 5: Plots by varying the ability parameter for various families of ability profiles with an [PITH_FULL_IMAGE:figures/full_fig_p023_5.png]
Figure 6
Figure 6. Figure 6: Heatmaps of productivity compression value [PITH_FULL_IMAGE:figures/full_fig_p031_6.png]
Figure 7
Figure 7. Figure 7: Plots illustrating the relationship between the absolute derivatives |P ′ a | and |P ′ σ | and a, σ for the Computer Programmers example with default settings of (a, σ, τ ) = (0.22, 0.08, 0.45). C Additional implications of theoretical results We empirically analyze th…
Figure 8
Figure 8. Figure 8: Plots illustrating the relationship between the ratio rβ and the bias parameter β for the Computer Programmers example with default settings of τ = 0.45. (a) ∆ v.s. c (b) ∆ v.s. λ (c) Heatmap of ∆ [PITH_FULL_IMAGE:figures/full_fig_p035_8.png]
Figure 9
Figure 9. Figure 9: Plots illustrating the relationship between the probability gain ∆ = Pmerge − max{P1, P2} and the W2’s action-level ability parameter c and trust parameter λ to W2’s action-level ability for the Computer Programmers example with default settings of τ = 0.45. Here, λ > …
Figure 10
Figure 10. Figure 10: The derived data for tasks and skills are summarized in Tables 1 and 2, respectively. [PITH_FULL_IMAGE:figures/full_fig_p036_10.png]
Figure 10
Figure 10. Figure 10: Deriving job data for computer programmers from O*NET. Subfigures (a) and (b) are on [PITH_FULL_IMAGE:figures/full_fig_p037_10.png]
Figure 11
Figure 11. Figure 11: We fit the ability of the average human rater by 1 [PITH_FULL_IMAGE:figures/full_fig_p038_11.png]
Figure 11
Figure 11. Figure 11: Accuracies of the average human rater and LLM vs. skill proficiency for tasks in [PITH_FULL_IMAGE:figures/full_fig_p040_11.png]
Figure 12
Figure 12. Figure 12: The prompt is: “# Tables 1 and 2. Given a list of [PITH_FULL_IMAGE:figures/full_fig_p042_12.png]
Figure 12
Figure 12. Figure 12: Task-skill dependency graph for the Computer Programmers example. In this graph, T1 = [6, 8, 9, 16, 18], T2 = [5, 7, 11, 16, 18], T3 = [5, 13, 14, 16, 18], T4 = [1, 4, 13, 18], T5 = [2, 7, 10, 17], T6 = [6, 11, 16, 18], T7 = [6, 8, 9, 18], T8 = [8, 11, 16, 18], T9 = […
Figure 13
Figure 13. Figure 13: A flow chart for the Computer Programmers example that illustrates how to use our [PITH_FULL_IMAGE:figures/full_fig_p045_13.png]
Figure 14
Figure 14. Figure 14: Plots illustrating the relationship between the success probability P(α1, α2, h, g, f, τ ) and the ability parameter a and dependency parameter p for the Computer Programmers example with default settings of (σ, τ ) = (0.08, 0.6), replacing the error functions g, f fr…
Figure 15
Figure 15. Figure 15: Heatmaps of job success probability Pmerge and the probability gain ∆ = Pmerge − max {P1, P2} by merging two workers for different ranges of (a, c) for the Computer Programmers example with default settings of τ = 0.6, replacing the error functions g, f from weighted …
Figure 16
Figure 16. Figure 16: Plots illustrating the relationship between the success probability P(α1, α2, h, g, f, τ ) and the ability parameter a and dependency parameter p for the Computer Programmers example with default settings of (σ, τ ) = (0.2, 0.4), replacing the truncated normal noise i…
Figure 17
Figure 17. Figure 17: Heatmaps of job success probability Pmerge and the probability gain ∆ = Pmerge − max {P1, P2} by merging two workers for different ranges of (a, c) for the Computer Programmers example with default settings of (σ1, σ2, τ ) = (0.2, 0.29, 0.4), replacing the truncated n…
Figure 18
Figure 18. Figure 18: Plots illustrating the relationship between the success probability P(α1, α2, h, g, f, τ ) and the ability parameter a and dependency parameter p for the Computer Programmers example with default settings of (σ, τ ) = (0.08, 0.45), randomly shifting five edges in the …
Figure 19
Figure 19. Figure 19: Heatmaps of job success probability Pmerge and the probability gain ∆ = Pmerge − max {P1, P2} by merging two workers for different ranges of (a, c) for the Computer Programmers example with default settings of τ = 0.45, randomly shifting five edges in the task-skill d…

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Pith tools

Reviewed August 7, 2026 · model on record in the stance chip above.